首页 > 最新文献

Catalysis Science & Technology最新文献

英文 中文
Selective deoxygenation of polar polymers using metal supported on TiO2 nanotubes 利用 TiO2 纳米管上的金属支撑对极性聚合物进行选择性脱氧
IF 5 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-12 DOI: 10.1039/d4cy00404c
Dai-Phat Bui, Laura A. Gomez, Ismael Alalq, Luis Trevisi, Ana Carolina Jerdy, Han K. Chau, Lance L. Lobban, Steven P. Crossley
Polar polymers such as poly(vinyl alcohol-co-ethylene) (EVOH) serve as excellent oxygen barriers in multilayered polymer films. However, their presence creates significant challenges for subsequent recycling. Melting and thermal degradation leave behind small domains of immiscible phases that render the final material less valuable. Here, we report a strategy to selectively remove OH groups from the EVOH polymer while preserving the polymer's hydrocarbon backbone. Pd supported on TiO2 nanotubes exhibits excellent activity and selectivity for C–O bond scission and hydrogenation. This is evidenced in our study, which utilizes both the model compound 2,5-hexanediol (a small surrogate for polyols) and EVOH. The Lewis-acid sites generated on the TiO2 surface, coupled with hydrogen dissociation on the metal particles and unique sites at the metal support interface, result in enhanced deoxygenation rates to generate saturated products at atmospheric pressure. The intimacy between Pd particles and their TiO2 supports for EVOH conversion is also discussed.
聚乙烯醇缩乙烯(EVOH)等极性聚合物在多层聚合物薄膜中可作为出色的氧气屏障。然而,极性聚合物的存在给后续回收利用带来了巨大挑战。熔融和热降解会留下不相溶的小域,从而降低最终材料的价值。在此,我们报告了一种选择性去除 EVOH 聚合物中 OH 基团,同时保留聚合物碳氢骨架的策略。以二氧化钛纳米管为支撑的钯在 C-O 键裂解和氢化方面表现出卓越的活性和选择性。这一点在我们利用模型化合物 2,5-己二醇(多元醇的一种小型替代物)和 EVOH 进行的研究中得到了证明。二氧化钛表面产生的路易斯酸位点,加上金属颗粒上的氢离解和金属支撑界面上的独特位点,提高了脱氧速率,从而在大气压力下生成饱和产物。此外,还讨论了 Pd 粒子及其 TiO2 支持物在 EVOH 转化过程中的密切关系。
{"title":"Selective deoxygenation of polar polymers using metal supported on TiO2 nanotubes","authors":"Dai-Phat Bui, Laura A. Gomez, Ismael Alalq, Luis Trevisi, Ana Carolina Jerdy, Han K. Chau, Lance L. Lobban, Steven P. Crossley","doi":"10.1039/d4cy00404c","DOIUrl":"https://doi.org/10.1039/d4cy00404c","url":null,"abstract":"Polar polymers such as poly(vinyl alcohol-<em>co</em>-ethylene) (EVOH) serve as excellent oxygen barriers in multilayered polymer films. However, their presence creates significant challenges for subsequent recycling. Melting and thermal degradation leave behind small domains of immiscible phases that render the final material less valuable. Here, we report a strategy to selectively remove OH groups from the EVOH polymer while preserving the polymer's hydrocarbon backbone. Pd supported on TiO<small><sub>2</sub></small> nanotubes exhibits excellent activity and selectivity for C–O bond scission and hydrogenation. This is evidenced in our study, which utilizes both the model compound 2,5-hexanediol (a small surrogate for polyols) and EVOH. The Lewis-acid sites generated on the TiO<small><sub>2</sub></small> surface, coupled with hydrogen dissociation on the metal particles and unique sites at the metal support interface, result in enhanced deoxygenation rates to generate saturated products at atmospheric pressure. The intimacy between Pd particles and their TiO<small><sub>2</sub></small> supports for EVOH conversion is also discussed.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
2,3-Diamino-4,5-diarylcyclopentadienone iron carbonyl complexes as catalysts for reductive amination reactions 作为还原胺化反应催化剂的 2,3-二氨基-4,5-二芳基环戊二烯酮铁羰基复合物
IF 5 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-08 DOI: 10.1039/d4cy00372a
Lukas Körner, Dirk Bockfeld, Thomas Bannenberg, Matthias Tamm
The reaction of dipiperidinoacetylene, (CH2)5NC[triple bond, length as m-dash]CN(CH2)5, with a series of 2,3-diarylcyclopropenones (Ar)2C3O (Ar = phenyl, 4-tert-butylphenyl, 2,5-dimethylphenyl, 4-trifluoromethylphenyl) afforded 2,3-dipiperidino-4,5-diarylcyclopentadienones, which were used to prepare cyclopentadienone (CPD) iron tricarbonyl complexes [(CPD)Fe(CO)3] by the reaction with Fe2(CO)9. Subsequent treatment with trimethylamine-N-oxide in the presence of acetonitrile afforded the corresponding acetonitrile complexes [(CPD)Fe(CO)2(NCCH3)], which were used as catalysts for the reductive amination of citronellal with various secondary amines under 5 bar of dihydrogen pressure. The first iron-catalysed reductive amination for the preparation of the pharmaceutically important antidepressant sertraline is also reported.
二哌啶基乙炔((CH2)5NCCN(CH2)5)与一系列 2,3-二芳基环丙烯酮(Ar)2C3O(Ar = 苯基、4-叔丁基苯基、2,5-二甲基苯基、4-三氟甲基苯基)反应得到 2、与 Fe2(CO)9 反应制备环戊二烯酮(CPD)三羰基铁络合物 [(CPD)Fe(CO)3]。随后在乙腈存在下用三甲胺-N-氧化物进行处理,得到了相应的乙腈络合物[(CPD)Fe(CO)2(NCCH3)],并将其用作催化剂,在 5 巴二氢压力下将香茅醛与各种仲胺进行还原胺化反应。报告还首次报道了铁催化还原胺化反应制备具有重要药用价值的抗抑郁药舍曲林。
{"title":"2,3-Diamino-4,5-diarylcyclopentadienone iron carbonyl complexes as catalysts for reductive amination reactions","authors":"Lukas Körner, Dirk Bockfeld, Thomas Bannenberg, Matthias Tamm","doi":"10.1039/d4cy00372a","DOIUrl":"https://doi.org/10.1039/d4cy00372a","url":null,"abstract":"The reaction of dipiperidinoacetylene, (CH<small><sub>2</sub></small>)<small><sub>5</sub></small>NC<img alt=\"[triple bond, length as m-dash]\" border=\"0\" src=\"https://www.rsc.org/images/entities/char_e002.gif\">CN(CH<small><sub>2</sub></small>)<small><sub>5</sub></small>, with a series of 2,3-diarylcyclopropenones (Ar)<small><sub>2</sub></small>C<small><sub>3</sub></small>O (Ar = phenyl, 4-<em>tert</em>-butylphenyl, 2,5-dimethylphenyl, 4-trifluoromethylphenyl) afforded 2,3-dipiperidino-4,5-diarylcyclopentadienones, which were used to prepare cyclopentadienone (CPD) iron tricarbonyl complexes [(CPD)Fe(CO)<small><sub>3</sub></small>] by the reaction with Fe<small><sub>2</sub></small>(CO)<small><sub>9</sub></small>. Subsequent treatment with trimethylamine-<em>N</em>-oxide in the presence of acetonitrile afforded the corresponding acetonitrile complexes [(CPD)Fe(CO)<small><sub>2</sub></small>(NCCH<small><sub>3</sub></small>)], which were used as catalysts for the reductive amination of citronellal with various secondary amines under 5 bar of dihydrogen pressure. The first iron-catalysed reductive amination for the preparation of the pharmaceutically important antidepressant sertraline is also reported.</img>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141611415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Catalytic N2O decomposition in an electric field at low temperatures 低温电场催化 N2O 分解
IF 5 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-08 DOI: 10.1039/d4cy00698d
Ayaka Shigemoto, Takuma Higo, Chihiro Ukai, Yuki Inoda, Kenta Mitarai, Yasushi Sekine
Nitrous oxide (N2O) exerts strong effects on global warming and environmental destruction. Various catalytic technologies have been investigated for N2O abatement. We investigated a catalytic system in an electric field, revealing that N2O can be decomposed efficiently, even at low temperatures and in the presence of excess oxygen and water vapour. Reaction mechanisms with and without an electric field have been investigated using kinetics and various operando analyses, which revealed that surface-lattice oxygen on catalyst supports plays a crucially important role in N2O decomposition in an electric field at low temperatures.
一氧化二氮(N2O)对全球变暖和环境破坏有很大影响。人们研究了各种减少一氧化二氮的催化技术。我们对电场中的催化系统进行了研究,结果表明,即使在低温和存在过量氧气和水蒸气的情况下,也能有效分解一氧化二氮。我们利用动力学和各种运算分析研究了有电场和无电场时的反应机理,结果表明,催化剂载体上的表面晶格氧在低温电场中分解 N2O 的过程中起着至关重要的作用。
{"title":"Catalytic N2O decomposition in an electric field at low temperatures","authors":"Ayaka Shigemoto, Takuma Higo, Chihiro Ukai, Yuki Inoda, Kenta Mitarai, Yasushi Sekine","doi":"10.1039/d4cy00698d","DOIUrl":"https://doi.org/10.1039/d4cy00698d","url":null,"abstract":"Nitrous oxide (N<small><sub>2</sub></small>O) exerts strong effects on global warming and environmental destruction. Various catalytic technologies have been investigated for N<small><sub>2</sub></small>O abatement. We investigated a catalytic system in an electric field, revealing that N<small><sub>2</sub></small>O can be decomposed efficiently, even at low temperatures and in the presence of excess oxygen and water vapour. Reaction mechanisms with and without an electric field have been investigated using kinetics and various <em>operando</em> analyses, which revealed that surface-lattice oxygen on catalyst supports plays a crucially important role in N<small><sub>2</sub></small>O decomposition in an electric field at low temperatures.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A review on durability of key components of PEM fuel cells 关于 PEM 燃料电池关键部件耐久性的综述
IF 5 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-08 DOI: 10.1039/d4cy00351a
Zhenyang Xie, Jian Wang, Guangyao Zhao, Qinyi Zhang, Hua Fan, Aohua Zeng, Wei Ding
Proton exchange membrane fuel cells (PEMFCs) are considered to be a clean energy technology to replace conventional internal combustion engines in automobiles. PEMFCs undergo a complex degradation involving multiple dimensions, materials, and factors. This review focuses on the decay of key materials of PEMFCs after durability tests longer than 2000 hours, providing an in-depth look at degradation behaviors at the material and component levels. The H2-crossover current, ohmic resistance, kinetics current and the limiting current were thus identified as core primary factors from the perspective of performance and stability. Besides, the critical aging factors of key components were defined as where significant numerical changes occur during the aging process, causing any one or more of the four core primary factors to change by more than 10% in physical or chemical parameters.
质子交换膜燃料电池(PEMFCs)被认为是一种清洁能源技术,可取代传统的汽车内燃机。PEMFC 的降解过程非常复杂,涉及多个层面、材料和因素。本综述重点关注 PEMFC 关键材料在超过 2000 小时的耐久性测试后的衰减情况,深入探讨材料和组件层面的降解行为。因此,从性能和稳定性的角度来看,H2-交叉电流、欧姆电阻、动力学电流和极限电流被确定为核心的主要因素。此外,关键元件的临界老化因素被定义为在老化过程中发生重大数值变化,导致四个核心主要因素中的任何一个或多个物理或化学参数变化超过 10%。
{"title":"A review on durability of key components of PEM fuel cells","authors":"Zhenyang Xie, Jian Wang, Guangyao Zhao, Qinyi Zhang, Hua Fan, Aohua Zeng, Wei Ding","doi":"10.1039/d4cy00351a","DOIUrl":"https://doi.org/10.1039/d4cy00351a","url":null,"abstract":"Proton exchange membrane fuel cells (PEMFCs) are considered to be a clean energy technology to replace conventional internal combustion engines in automobiles. PEMFCs undergo a complex degradation involving multiple dimensions, materials, and factors. This review focuses on the decay of key materials of PEMFCs after durability tests longer than 2000 hours, providing an in-depth look at degradation behaviors at the material and component levels. The H<small><sub>2</sub></small>-crossover current, ohmic resistance, kinetics current and the limiting current were thus identified as core primary factors from the perspective of performance and stability. Besides, the critical aging factors of key components were defined as where significant numerical changes occur during the aging process, causing any one or more of the four core primary factors to change by more than 10% in physical or chemical parameters.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic stability of Pt-based alloys for fuel-cell catalysts calculated from atomistics 通过原子统计学计算燃料电池催化剂铂基合金的动态稳定性
IF 5 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-04 DOI: 10.1039/d4cy00463a
Shubham Sharma, Cheng Zeng, Andrew A. Peterson
The oxygen reduction reaction (ORR) is the fundamental electron-accepting reaction in aqueous electrochemistry, and is crucial to technologies such as fuel cells and batteries. Alloys of Pt that produce a surface Pt layer under mildly compressive strain are generally the most reactive catalysts for this reaction; however, their long-term durability can vary widely with preparation. In this work, we develop atomistic models based on electronic structure calculations to compare and rationalize the stability of such electrocatalysts, focusing on contrasting face-centered tetragonal (FCT or L10) alloys of Fe, Ni and Co with that of their face-centered cubic (FCC or L12) counterparts. We first describe how the non-noble elements Ni, Fe, Co and Sc of the near-surface alloy have the driving force to undergo rapid dissolution at fuel-cell operating conditions, whereas Pt is quite stable against dissolution, leading to the well-known surface Pt enrichment. Post dissolution, we discuss the kinetics associated with diffusion of sub-surface elements through a vacancy mediated diffusion model. Through the diffusion models, we compare and discuss the effect of geometry and surface structure on an electrocatalyst's stability. We show that alloying Pt with non-noble elements results in significantly higher kinetic stability of the core as compared to pure Pt. Our calculations suggest that the diffusion energetics at the bulk can be quite different from the near-surface region; we conclude the surface rates are more essential. We find that L10 structures of Fe and Co could provide better stability than the L12 systems, especially in the presence of Pt overlayers. In contrast, for Sc-containing species, we argue that presence of Pt overlayers destabilizes the catalytic surface, as also reported by an experimental study.
氧还原反应(ORR)是水电化学中最基本的电子接受反应,对燃料电池和电池等技术至关重要。在轻度压缩应变作用下产生表面铂层的铂合金通常是该反应中活性最高的催化剂;然而,其长期耐久性会因制备方法的不同而有很大差异。在这项工作中,我们基于电子结构计算建立了原子模型,以比较和合理解释此类电催化剂的稳定性,重点是将铁合金、镍合金和钴合金的面心四方合金(FCT 或 L10)与它们的面心立方合金(FCC 或 L12)进行对比。我们首先描述了近表面合金中的镍、铁、钴和钪等非贵族元素如何在燃料电池工作条件下快速溶解,而铂对溶解相当稳定,从而导致众所周知的表面铂富集。溶解后,我们通过空位介导扩散模型讨论了与次表面元素扩散相关的动力学。通过扩散模型,我们比较并讨论了几何形状和表面结构对电催化剂稳定性的影响。我们的研究表明,与纯铂相比,将铂与非贵族元素合金化可显著提高核心的动力学稳定性。我们的计算表明,块体的扩散能与近表面区域的扩散能截然不同;我们的结论是,表面速率更为重要。我们发现,铁和钴(Fe and Co)的 L10 结构比 L12 系统具有更好的稳定性,尤其是在存在铂覆盖层的情况下。相反,对于含 Sc 的物种,我们认为铂覆盖层的存在会破坏催化表面的稳定性,这也是一项实验研究的结果。
{"title":"Dynamic stability of Pt-based alloys for fuel-cell catalysts calculated from atomistics","authors":"Shubham Sharma, Cheng Zeng, Andrew A. Peterson","doi":"10.1039/d4cy00463a","DOIUrl":"https://doi.org/10.1039/d4cy00463a","url":null,"abstract":"The oxygen reduction reaction (ORR) is the fundamental electron-accepting reaction in aqueous electrochemistry, and is crucial to technologies such as fuel cells and batteries. Alloys of Pt that produce a surface Pt layer under mildly compressive strain are generally the most reactive catalysts for this reaction; however, their long-term durability can vary widely with preparation. In this work, we develop atomistic models based on electronic structure calculations to compare and rationalize the stability of such electrocatalysts, focusing on contrasting face-centered tetragonal (FCT or L1<small><sub>0</sub></small>) alloys of Fe, Ni and Co with that of their face-centered cubic (FCC or L1<small><sub>2</sub></small>) counterparts. We first describe how the non-noble elements Ni, Fe, Co and Sc of the near-surface alloy have the driving force to undergo rapid dissolution at fuel-cell operating conditions, whereas Pt is quite stable against dissolution, leading to the well-known surface Pt enrichment. Post dissolution, we discuss the kinetics associated with diffusion of sub-surface elements through a vacancy mediated diffusion model. Through the diffusion models, we compare and discuss the effect of geometry and surface structure on an electrocatalyst's stability. We show that alloying Pt with non-noble elements results in significantly higher kinetic stability of the core as compared to pure Pt. Our calculations suggest that the diffusion energetics at the bulk can be quite different from the near-surface region; we conclude the surface rates are more essential. We find that L1<small><sub>0</sub></small> structures of Fe and Co could provide better stability than the L1<small><sub>2</sub></small> systems, especially in the presence of Pt overlayers. In contrast, for Sc-containing species, we argue that presence of Pt overlayers destabilizes the catalytic surface, as also reported by an experimental study.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of titania and ceria support effects in nickel catalyzed CO2 methanation 镍催化二氧化碳甲烷化过程中二氧化钛和铈支撑效应的研究
IF 5 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-03 DOI: 10.1039/d4cy00461b
Majed Alam Abir, Rachel E. Phillips, Joseph Z. M. Harrah, Madelyn R. Ball
Ni catalysts, supported on TiO2 or CeO2, are active and selective for CO2 methanation. To investigate the role of the support on the resulting Ni structure and catalytic performance, catalysts were prepared by strong electrostatic adsorption, incipient wetness impregnation, and colloidal nanoparticle synthesis. The reactivity follows a volcano-type trend with Ni particle size on both TiO2 and CeO2 supports. To explain this trend, the role of the support on the reducibility of the Ni particles and distribution of basic sites on CO2 methanation activity was investigated. Using in situ infrared spectroscopy, we found that on TiO2 supported catalysts with larger Ni particles, CO2 methanation proceeds via a CO intermediate and the highest activity was observed when CO2 methanation occurs through both CO and carbonate intermediates. For catalysts with smaller particles on TiO2, however, no CO intermediates are observed, and catalytic activity is lower. For CeO2, the methanation also proceeds via a CO intermediate, though for larger Ni particles only CO species were observed. CeO2 without Ni can create surface formate species but has low reactivity towards methanation. In this investigation, we demonstrate a connection between the size of Ni particles, their corresponding adsorbed surface species, and their reactivity for CO2 methanation.
以 TiO2 或 CeO2 为载体的 Ni 催化剂对二氧化碳甲烷化具有活性和选择性。为了研究支撑物对所产生的 Ni 结构和催化性能的作用,我们通过强静电吸附、初湿浸渍和胶体纳米粒子合成等方法制备了催化剂。在 TiO2 和 CeO2 载体上,反应活性随 Ni 粒子大小的变化呈现火山型趋势。为了解释这一趋势,研究了支撑物对 Ni 粒子还原性和碱性位点分布对 CO2 甲烷化活性的作用。利用原位红外光谱,我们发现在镍颗粒较大的二氧化钛载体催化剂上,二氧化碳甲烷化是通过一氧化碳中间产物进行的,而当二氧化碳甲烷化同时通过一氧化碳和碳酸盐中间产物进行时,活性最高。然而,对于 TiO2 上颗粒较小的催化剂,没有观察到 CO 中间体,催化活性较低。对于 CeO2,甲烷化也是通过 CO 中间体进行的,但对于较大的 Ni 粒子,只观察到 CO 物种。不含镍的 CeO2 可以产生表面甲酸盐物种,但甲烷化反应活性较低。在这项研究中,我们证明了镍颗粒的大小、其相应的吸附表面物种及其对 CO2 甲烷化的反应性之间的联系。
{"title":"Investigation of titania and ceria support effects in nickel catalyzed CO2 methanation","authors":"Majed Alam Abir, Rachel E. Phillips, Joseph Z. M. Harrah, Madelyn R. Ball","doi":"10.1039/d4cy00461b","DOIUrl":"https://doi.org/10.1039/d4cy00461b","url":null,"abstract":"Ni catalysts, supported on TiO<small><sub>2</sub></small> or CeO<small><sub>2</sub></small>, are active and selective for CO<small><sub>2</sub></small> methanation. To investigate the role of the support on the resulting Ni structure and catalytic performance, catalysts were prepared by strong electrostatic adsorption, incipient wetness impregnation, and colloidal nanoparticle synthesis. The reactivity follows a volcano-type trend with Ni particle size on both TiO<small><sub>2</sub></small> and CeO<small><sub>2</sub></small> supports. To explain this trend, the role of the support on the reducibility of the Ni particles and distribution of basic sites on CO<small><sub>2</sub></small> methanation activity was investigated. Using <em>in situ</em> infrared spectroscopy, we found that on TiO<small><sub>2</sub></small> supported catalysts with larger Ni particles, CO<small><sub>2</sub></small> methanation proceeds <em>via</em> a CO intermediate and the highest activity was observed when CO<small><sub>2</sub></small> methanation occurs through both CO and carbonate intermediates. For catalysts with smaller particles on TiO<small><sub>2</sub></small>, however, no CO intermediates are observed, and catalytic activity is lower. For CeO<small><sub>2</sub></small>, the methanation also proceeds <em>via</em> a CO intermediate, though for larger Ni particles only CO species were observed. CeO<small><sub>2</sub></small> without Ni can create surface formate species but has low reactivity towards methanation. In this investigation, we demonstrate a connection between the size of Ni particles, their corresponding adsorbed surface species, and their reactivity for CO<small><sub>2</sub></small> methanation.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanistic origins for the enhanced ethanol dehydration kinetics in H-ZSM-5 by cofeeding n-butanol 正丁醇共馈增强 H-ZSM-5 中乙醇脱水动力学的机理渊源
IF 5 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-02 DOI: 10.1039/d4cy00532e
Arno de Reviere, An Verberckmoes, Maarten K. Sabbe
Periodic density functional theory (DFT) with dispersion corrections is used to construct a detailed reaction network for dehydration of n-butanol/ethanol mixtures in H-ZSM-5. Apart from the direct conversion of the alcohols to olefins or di-alkyl-ethers, novel mechanisms have been explored for the formation and decomposition of a cross-ether, butyl ethyl ether. Furthermore, a novel mechanism that affects the intrinsic activity of ethanol dehydration to ethene is found, the n-butanol-assisted ethanol dehydration. Thermodynamic and kinetic parameters for all elementary reaction steps were calculated and implemented in a microkinetic model capable of simulating the dehydration of (i) pure ethanol, (ii) pure n-butanol and (iii) n-butanol/ethanol mixtures over a H-ZSM-5 catalyst. The microkinetic model was able to reasonably predict the observed experimental results. A reaction path analysis shows that the mixed ether is primarily formed through an SN2 mechanism, where the water is split off from ethanol, except at low alcohol pressure. The mixed ether decomposes predominantly to butenes and ethanol. Contrary to pure ethanol dehydration, if sufficient n-butanol is available, ethylene is primarily formed through a novel butanol-assisted mechanism for n-butanol/ethanol mixtures, indicating the intrinsic activity for ethanol dehydration is – here beneficially – altered by cofeeding of butanol. These results hint towards the possibility of cofeeding strategies to accelerate the conversion of a less reactive reagent.
利用带有分散修正的周期密度泛函理论(DFT)构建了正丁醇/乙醇混合物在 H-ZSM-5 中脱水的详细反应网络。除了将醇直接转化为烯烃或二烷基醚之外,还探索了交叉醚--丁基乙基醚的形成和分解的新机制。此外,还发现了一种影响乙醇脱水生成乙烯内在活性的新机制,即正丁醇辅助乙醇脱水。计算了所有基本反应步骤的热力学和动力学参数,并将其应用于微观动力学模型,该模型能够模拟 H-ZSM-5 催化剂上 (i) 纯乙醇、(ii) 纯正丁醇和 (iii) 正丁醇/乙醇混合物的脱水过程。微动力学模型能够合理预测观察到的实验结果。反应路径分析表明,混合醚主要是通过 SN2 机制形成的,其中水从乙醇中分离出来,但低醇压时除外。混合醚主要分解为丁烯和乙醇。与纯乙醇脱水相反,如果有足够的正丁醇,乙烯主要是通过正丁醇/乙醇混合物的一种新的丁醇辅助机制形成的,这表明乙醇脱水的内在活性会因丁醇的共馈而发生有益的改变。这些结果表明,有可能采用共馈策略来加速活性较低的试剂的转化。
{"title":"Mechanistic origins for the enhanced ethanol dehydration kinetics in H-ZSM-5 by cofeeding n-butanol","authors":"Arno de Reviere, An Verberckmoes, Maarten K. Sabbe","doi":"10.1039/d4cy00532e","DOIUrl":"https://doi.org/10.1039/d4cy00532e","url":null,"abstract":"Periodic density functional theory (DFT) with dispersion corrections is used to construct a detailed reaction network for dehydration of <em>n</em>-butanol/ethanol mixtures in H-ZSM-5. Apart from the direct conversion of the alcohols to olefins or di-alkyl-ethers, novel mechanisms have been explored for the formation and decomposition of a cross-ether, butyl ethyl ether. Furthermore, a novel mechanism that affects the intrinsic activity of ethanol dehydration to ethene is found, the <em>n</em>-butanol-assisted ethanol dehydration. Thermodynamic and kinetic parameters for all elementary reaction steps were calculated and implemented in a microkinetic model capable of simulating the dehydration of (i) pure ethanol, (ii) pure <em>n</em>-butanol and (iii) <em>n</em>-butanol/ethanol mixtures over a H-ZSM-5 catalyst. The microkinetic model was able to reasonably predict the observed experimental results. A reaction path analysis shows that the mixed ether is primarily formed through an S<small><sub>N</sub></small>2 mechanism, where the water is split off from ethanol, except at low alcohol pressure. The mixed ether decomposes predominantly to butenes and ethanol. Contrary to pure ethanol dehydration, if sufficient <em>n</em>-butanol is available, ethylene is primarily formed through a novel butanol-assisted mechanism for <em>n</em>-butanol/ethanol mixtures, indicating the intrinsic activity for ethanol dehydration is – here beneficially – altered by cofeeding of butanol. These results hint towards the possibility of cofeeding strategies to accelerate the conversion of a less reactive reagent.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diffusion mechanisms and preferential dynamics of promoter molecules in ZSM-5 zeolite† 促进剂分子在 ZSM-5 沸石中的扩散机制和优先动力学
IF 4.4 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-01 DOI: 10.1039/d4cy00506f
Josh Dunn , Joe Crossley-Lewis , Andrew R. McCluskey , Fiona Jackson , Corneliu Buda , Glenn J. Sunley , Adrian J. Mulholland , Neil L. Allan

The diffusion in ZSM-5 zeolite of methanol and of two series of promoters of the methanol to dimethyl ether reaction (linear methyl esters, benzaldehyde, 4-n-alkyl benzaldehydes) has been studied using classical molecular dynamics in the NVT ensemble. Whereas promoter diffusion coefficients decrease with increasing alkyl chain length in methyl esters, the aromatic aldehyde promoters all have similar diffusion coefficients. The lowest diffusion coefficient is that of benzaldehyde. All the promoters exhibit a preference for moving in the straight pore, a preference that is most pronounced for the 4-n-alkylbenzaldehydes and least for the longest aliphatic esters. A novel diffusion mechanism, a molecular ‘3-point turn’, is observed. This likely plays an important role in allowing the most potent promoters, with longer linear alkyl chains, to access all of the Brønsted acid reaction sites. The diffusion coefficient of methanol is larger than that of all the promoters. The more catalytically active aromatic aldehyde promoters limit methanol diffusion less than the aliphatic esters.

在 NVT 集合中使用经典分子动力学方法研究了甲醇和甲醇制二甲醚反应的两个系列促进剂(线性甲酯、苯甲醛、4-正烷基苯甲醛)在 ZSM-5 沸石中的扩散。甲基酯的促进剂扩散系数随烷基链长度的增加而降低,而芳香醛促进剂的扩散系数则相似。扩散系数最低的是苯甲醛。所有促进剂都表现出在直孔中移动的偏好,这种偏好在 4-正烷基苯甲醛中最为明显,而在最长的脂肪族酯中最小。观察到一种新的扩散机制,即分子 "三点转向"。这可能在使具有较长线性烷基链的最强促进剂进入所有布氏酸反应位点方面发挥了重要作用。甲醇的扩散系数大于所有促进剂。催化活性更强的芳香醛促进剂对甲醇扩散的限制小于脂肪族酯类。
{"title":"Diffusion mechanisms and preferential dynamics of promoter molecules in ZSM-5 zeolite†","authors":"Josh Dunn ,&nbsp;Joe Crossley-Lewis ,&nbsp;Andrew R. McCluskey ,&nbsp;Fiona Jackson ,&nbsp;Corneliu Buda ,&nbsp;Glenn J. Sunley ,&nbsp;Adrian J. Mulholland ,&nbsp;Neil L. Allan","doi":"10.1039/d4cy00506f","DOIUrl":"10.1039/d4cy00506f","url":null,"abstract":"<div><p>The diffusion in ZSM-5 zeolite of methanol and of two series of promoters of the methanol to dimethyl ether reaction (linear methyl esters, benzaldehyde, 4-<em>n</em>-alkyl benzaldehydes) has been studied using classical molecular dynamics in the NVT ensemble. Whereas promoter diffusion coefficients decrease with increasing alkyl chain length in methyl esters, the aromatic aldehyde promoters all have similar diffusion coefficients. The lowest diffusion coefficient is that of benzaldehyde. All the promoters exhibit a preference for moving in the straight pore, a preference that is most pronounced for the 4-<em>n</em>-alkylbenzaldehydes and least for the longest aliphatic esters. A novel diffusion mechanism, a molecular ‘3-point turn’, is observed. This likely plays an important role in allowing the most potent promoters, with longer linear alkyl chains, to access all of the Brønsted acid reaction sites. The diffusion coefficient of methanol is larger than that of all the promoters. The more catalytically active aromatic aldehyde promoters limit methanol diffusion less than the aliphatic esters.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/cy/d4cy00506f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141254716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Boosting photocatalytic efficiency of iridium polypyridyl complex in coupling reaction through the induction of ferrocene: insights into bimetallic catalysis†‡ 通过诱导二茂铁提高多吡啶铱络合物在偶联反应中的光催化效率:双金属催化的启示†‡
IF 4.4 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-01 DOI: 10.1039/d3cy01418e
Firdaus Rahaman Gayen , Sakshi Chawla , Debashree Bora , Lodsna Borkotoky , Sarifuddin Gazi , Dibyendu Mallick , Ram Awatar Maurya , Arijit Kumar De , Biswajit Saha

A bimetallic compound [Ir(ppy)2(fcbpy)]PF6 (2, ppy = 2-phenylpyridine; fcbpy = 4-ferrocenyl-2,2′-bipyridine) is synthesized, and its molecular structure is established by single crystal XRD. The catalytic activity of 2 is probed in the coupling of α-ketovinylazides with N,N-dimethylanilines in the presence of light. A maximum of 94% yield is obtained within 23.9 minutes in a micro flowreactor with a turnover number and turnover frequency of 940 and 2350 h−1, respectively. A catalyst lacking the ferrocene moiety, [Ir(ppy)2(bpy)]PF6, failed to provide any yield even with higher catalyst loading. The redox and photophysical properties of 2 are thoroughly investigated using electrochemistry and different steady-state and time-resolved spectroscopic techniques. Photoluminescence lifetime measurements and femtosecond transient absorption studies revealed the formation of a long-lived excited state in 2 after photoexcitation. Thus, the enhanced catalytic performance through the induction of ferrocene is rationalized based on transiently shelving electrons in the triplet state for a longer period of time, thereby efficiently harnessing them in photocatalysis.

合成了双金属化合物 [Ir(ppy)2(fcbpy)]PF6 (2,ppy = 2-苯基吡啶;fcbpy = 4-二茂铁基-2,2′-联吡啶),并通过单晶 XRD 确定了其分子结构。在光的作用下,2 的催化活性在 α-酮乙烯氮化物与 N,N-二甲基苯胺的偶联反应中得到了验证。在周转次数和周转频率分别为 940 次和 2350 次/小时的微型流动反应器中,在 23.9 分钟内获得了 94% 的最高产率。缺乏二茂铁分子的催化剂[Ir(PY)2(PY)]PF6,即使在催化剂负载较高的情况下,也无法提供任何产率。利用电化学以及不同的稳态和时间分辨光谱技术,对 2 的氧化还原和光物理特性进行了深入研究。光致发光寿命测量和飞秒瞬态吸收研究表明,2 在光激发后形成了长寿命激发态。因此,通过诱导二茂铁来提高催化性能是合理的,其基础是将三重态电子瞬时搁置更长的时间,从而在光催化中有效地利用它们。
{"title":"Boosting photocatalytic efficiency of iridium polypyridyl complex in coupling reaction through the induction of ferrocene: insights into bimetallic catalysis†‡","authors":"Firdaus Rahaman Gayen ,&nbsp;Sakshi Chawla ,&nbsp;Debashree Bora ,&nbsp;Lodsna Borkotoky ,&nbsp;Sarifuddin Gazi ,&nbsp;Dibyendu Mallick ,&nbsp;Ram Awatar Maurya ,&nbsp;Arijit Kumar De ,&nbsp;Biswajit Saha","doi":"10.1039/d3cy01418e","DOIUrl":"10.1039/d3cy01418e","url":null,"abstract":"<div><p>A bimetallic compound [Ir(ppy)<sub>2</sub>(fcbpy)]PF<sub>6</sub> (<strong>2</strong>, ppy = 2-phenylpyridine; fcbpy = 4-ferrocenyl-2,2′-bipyridine) is synthesized, and its molecular structure is established by single crystal XRD. The catalytic activity of <strong>2</strong> is probed in the coupling of α-ketovinylazides with <em>N</em>,<em>N</em>-dimethylanilines in the presence of light. A maximum of 94% yield is obtained within 23.9 minutes in a micro flowreactor with a turnover number and turnover frequency of 940 and 2350 h<sup>−1</sup>, respectively. A catalyst lacking the ferrocene moiety, [Ir(ppy)<sub>2</sub>(bpy)]PF<sub>6</sub>, failed to provide any yield even with higher catalyst loading. The redox and photophysical properties of <strong>2</strong> are thoroughly investigated using electrochemistry and different steady-state and time-resolved spectroscopic techniques. Photoluminescence lifetime measurements and femtosecond transient absorption studies revealed the formation of a long-lived excited state in <strong>2</strong> after photoexcitation. Thus, the enhanced catalytic performance through the induction of ferrocene is rationalized based on transiently shelving electrons in the triplet state for a longer period of time, thereby efficiently harnessing them in photocatalysis.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141475023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of machine learning to discover new intermetallic catalysts for the hydrogen evolution and the oxygen reduction reactions† 应用机器学习发现氢气进化和氧气还原反应的新型金属间催化剂†。
IF 4.4 3区 化学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2024-07-01 DOI: 10.1039/d4cy00491d
Carmen Martínez-Alonso , Valentin Vassilev-Galindo , Benjamin M. Comer , Frank Abild-Pedersen , Kirsten T. Winther , Javier LLorca

The adsorption energies for hydrogen, oxygen, and hydroxyl were calculated by means of density functional theory on the lowest energy surface of 24 pure metals and 332 binary intermetallic compounds with stoichiometries AB, A2B, and A3B taking into account the effect of biaxial elastic strains. This information was used to train two random forest regression models, one for the hydrogen adsorption and another for the oxygen and hydroxyl adsorption, based on 9 descriptors that characterized the geometrical and chemical features of the adsorption site as well as the applied strain. All the descriptors for each compound in the models could be obtained from physico-chemical databases. The random forest models were used to predict the adsorption energy for hydrogen, oxygen, and hydroxyl of ≈2700 binary intermetallic compounds with stoichiometries AB, A2B, and A3B made of metallic elements, excluding those that were environmentally hazardous, radioactive, or toxic. This information was used to search for potential good catalysts for the HER and ORR from the criteria that their adsorption energy for H and O/OH, respectively, should be close to that of Pt. This investigation shows that the suitably trained machine learning models can predict adsorption energies with an accuracy not far away from density functional theory calculations with minimum computational cost from descriptors that are readily available in physico-chemical databases for any compound. Moreover, the strategy presented in this paper can be easily extended to other compounds and catalytic reactions, and is expected to foster the use of ML methods in catalysis.

考虑到双轴弹性应变的影响,通过密度泛函理论计算了 24 种纯金属和 332 种二元金属间化合物(化学计量学为 AB、A2B 和 A3B)的最低能量表面对氢、氧和羟基的吸附能。这些信息被用来训练两个随机森林回归模型,一个用于氢吸附,另一个用于氧和羟基吸附,这两个模型基于 9 个描述符,这些描述符描述了吸附位点的几何和化学特征以及所施加的应变。模型中每种化合物的所有描述符都可以从物理化学数据库中获得。随机森林模型用于预测由金属元素组成的化学计量学为 AB、A2B 和 A3B 的 ≈2700 种二元金属间化合物对氢、氧和羟基的吸附能,其中不包括那些对环境有害、具有放射性或毒性的化合物。这些信息被用来寻找 HER 和 ORR 的潜在良好催化剂,其标准是它们对 H 和 O/OH 的吸附能应分别接近铂的吸附能。这项研究表明,经过适当训练的机器学习模型可以利用任何化合物的物理化学数据库中现成的描述符预测吸附能,其准确性与密度泛函理论计算相差无几,而且计算成本最低。此外,本文介绍的策略可以轻松扩展到其他化合物和催化反应,有望促进 ML 方法在催化领域的应用。
{"title":"Application of machine learning to discover new intermetallic catalysts for the hydrogen evolution and the oxygen reduction reactions†","authors":"Carmen Martínez-Alonso ,&nbsp;Valentin Vassilev-Galindo ,&nbsp;Benjamin M. Comer ,&nbsp;Frank Abild-Pedersen ,&nbsp;Kirsten T. Winther ,&nbsp;Javier LLorca","doi":"10.1039/d4cy00491d","DOIUrl":"10.1039/d4cy00491d","url":null,"abstract":"<div><p>The adsorption energies for hydrogen, oxygen, and hydroxyl were calculated by means of density functional theory on the lowest energy surface of 24 pure metals and 332 binary intermetallic compounds with stoichiometries AB, A<sub>2</sub>B, and A<sub>3</sub>B taking into account the effect of biaxial elastic strains. This information was used to train two random forest regression models, one for the hydrogen adsorption and another for the oxygen and hydroxyl adsorption, based on 9 descriptors that characterized the geometrical and chemical features of the adsorption site as well as the applied strain. All the descriptors for each compound in the models could be obtained from physico-chemical databases. The random forest models were used to predict the adsorption energy for hydrogen, oxygen, and hydroxyl of ≈2700 binary intermetallic compounds with stoichiometries AB, A<sub>2</sub>B, and A<sub>3</sub>B made of metallic elements, excluding those that were environmentally hazardous, radioactive, or toxic. This information was used to search for potential good catalysts for the HER and ORR from the criteria that their adsorption energy for H and O/OH, respectively, should be close to that of Pt. This investigation shows that the suitably trained machine learning models can predict adsorption energies with an accuracy not far away from density functional theory calculations with minimum computational cost from descriptors that are readily available in physico-chemical databases for any compound. Moreover, the strategy presented in this paper can be easily extended to other compounds and catalytic reactions, and is expected to foster the use of ML methods in catalysis.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141475056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Catalysis Science & Technology
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1