Chem Catalysis最新文献_第5页

Operando fluorescence spectroscopy for evaluating the activity of fatty acid hydrogenation catalysts 荧光光谱法评价脂肪酸加氢催化剂的活性

IF 9.4

Chem Catalysis Pub Date : 2025-05-20 DOI: 10.1016/j.checat.2025.101390

Jelle W. Bos, P. Tim Prins, Joris C.L. Janssens, Ramon Oord, Thimo S. Jacobs, Robin Vogel, Matteo Monai, Eelco T.C. Vogt, Bert M. Weckhuysen

引用次数: 0

Differential pressure CO2 electrolysis opens the way for direct coupling to industrial processes 差压CO2电解为工业过程的直接耦合开辟了道路

IF 9.4

Chem Catalysis Pub Date : 2025-05-20 DOI: 10.1016/j.checat.2025.101393

Stephan Heuser, Lucas Hoof, Kevinjeorjios Pellumbi, Jan Niklas Oberndorf, Lennart Krämer, Dennis Blaudszun, Kai junge Puring, Michael Prokein, Nils Mölders, Andreas Kilzer, Marcus Petermann, Ulf-Peter Apfel

{"title":"Differential pressure CO2 electrolysis opens the way for direct coupling to industrial processes","authors":"Stephan Heuser, Lucas Hoof, Kevinjeorjios Pellumbi, Jan Niklas Oberndorf, Lennart Krämer, Dennis Blaudszun, Kai junge Puring, Michael Prokein, Nils Mölders, Andreas Kilzer, Marcus Petermann, Ulf-Peter Apfel","doi":"10.1016/j.checat.2025.101393","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101393","url":null,"abstract":"Pressurized electrochemical carbon dioxide reduction (CO2R) offers a pathway to enhance selectivity, current density, and process integration. While elevated pressures improve CO2R performance, differential pressure operation above 10 bar between cathode and anode remains underexplored. This study introduces an innovative test facility and a continuous high-pressure reactor with a zero-gap architecture, enabling gaseous CO2 electrolysis at a differential pressure of 40 bar(g). Using a bipolar membrane electrode assembly eliminates the need for CO2 humidification, and using ultrapure water as the sole proton source creates a salt-free environment without acid or base additives. This setup achieved a Faraday efficiency for CO of 81% at 500 mA cm−2, efficient CO2R with a CO2 excess (λCO2) below 4, and single-pass conversion rates up to 26% at 40 bar(g). The pressurized CO2R outlet streams have low CO2 content, enabling direct integration into downstream chemical processes. This marks a key advancement toward scalable, energy-efficient industrial CO2 electrolysis systems.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"31 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144097542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carbene-mediated photocatalytic ethanol synthesis by frustrated Lewis pairs 受阻路易斯对催化卡宾介导的光催化乙醇合成

IF 9.4

Chem Catalysis Pub Date : 2025-05-15 DOI: 10.1016/j.checat.2025.101385

Linqun Yu, Song Li, Zhenyi Zhang

引用次数: 0

Boosting hole mobility in oxides via metal vacancies 通过金属空位提高氧化物的空穴迁移率

IF 9.4

Chem Catalysis Pub Date : 2025-05-15 DOI: 10.1016/j.checat.2025.101391

Fatwa F. Abdi

引用次数: 0

Viologen-COF enables near-infrared photocatalysis via linker-to-linker charge transfer Viologen-COF通过连接体之间的电荷转移实现近红外光催化

IF 9.4

Chem Catalysis Pub Date : 2025-05-15 DOI: 10.1016/j.checat.2025.101395

Yuting Liu, Xiaokun Shi, Xin Chen, Ya Du

引用次数: 0

Nitrite to amine in one pot 亚硝酸盐到胺在一个锅里

IF 9.4

Chem Catalysis Pub Date : 2025-05-15 DOI: 10.1016/j.checat.2025.101384

Chen Chen, Ning Yan

引用次数: 0

Challenges of characterizing degradation in hydrogen polymer electrolyte fuel cells 表征氢聚合物电解质燃料电池降解的挑战

IF 9.4

Chem Catalysis Pub Date : 2025-05-15 DOI: 10.1016/j.checat.2025.101387

Andrea Baricci, Elena Colombo, Andrea Mattera

引用次数: 0

Waste oxidation as a pathway to energy-efficient electrochemical processes 废物氧化是实现节能电化学过程的途径

IF 9.4

Chem Catalysis Pub Date : 2025-05-14 DOI: 10.1016/j.checat.2025.101392

Emilly Cristine de Brito Dorneles, Kirsten Van Fossen, Anna Li, Magda Helena Barecka

引用次数: 0

Polyaniline-supported copper nanocrystals for electrochemical CO2 reduction to methane 聚苯胺负载的铜纳米晶电化学CO2还原为甲烷

IF 9.4

Chem Catalysis Pub Date : 2025-05-12 DOI: 10.1016/j.checat.2025.101389

Rong Chen, Jing Gao, Shuangte Zhao, Hongguang Wang, Guilin Zhuang, Peter A. van Aken, Michael Grätzel, Jingshan Luo

{"title":"Polyaniline-supported copper nanocrystals for electrochemical CO2 reduction to methane","authors":"Rong Chen, Jing Gao, Shuangte Zhao, Hongguang Wang, Guilin Zhuang, Peter A. van Aken, Michael Grätzel, Jingshan Luo","doi":"10.1016/j.checat.2025.101389","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101389","url":null,"abstract":"Achieving industrial electrochemical CO2 reduction necessitates the strategic design of electrocatalysts with high activity, superior selectivity, and excellent stability. Herein, we developed spatially dispersed copper nanocrystals supported by polyaniline (PANI-CuNCs) for electrochemical CO2 reduction, achieving a faradaic efficiency of 68.6% ± 2.2% toward methane at −300 mA cm−2. The chelation of the Cu precursor within the oxidized emeraldine base (EB) is crucial for forming isolated CuNCs. The PANI substrate facilitates proton shuttling to Cu(111) sites, enhancing methane production by promoting protonation and reducing ∗CO coverage. In situ Raman and theoretical calculations show that PANI improves CO2 adsorption and activation by creating a hydrophilic environment, highlighting its potential for industrial CO2 reduction electrocatalysis. Our work introduced a promising strategy that utilizes polymers as substrates to prepare well-dispersed NCs for electrocatalysis, highlighting the potential of such systems in advancing the field of industrial electrochemical CO2 reduction.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"28 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143933520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modular silver catalysts to elucidate the role of non-covalent interactions in asymmetric C‒H amidation reactions 模块银催化剂阐明非共价相互作用在不对称C-H酰胺化反应中的作用

IF 9.4

Chem Catalysis Pub Date : 2025-05-12 DOI: 10.1016/j.checat.2025.101388

Emily Z. Schroeder, Jed H. Kim, Yue Fu, Wentan Liu, Peng Liu, Jennifer M. Schomaker

{"title":"Modular silver catalysts to elucidate the role of non-covalent interactions in asymmetric C‒H amidation reactions","authors":"Emily Z. Schroeder, Jed H. Kim, Yue Fu, Wentan Liu, Peng Liu, Jennifer M. Schomaker","doi":"10.1016/j.checat.2025.101388","DOIUrl":"https://doi.org/10.1016/j.checat.2025.101388","url":null,"abstract":"Chiral, non-racemic amines and aminoalcohols are common structural motifs in bioactive molecules. Asymmetric nitrene transfer offers a powerful approach to prepare enantioenriched amines directly from abundant C–H bonds; however, the development of general, cost-effective catalysts supported by easily tunable ligands remains a significant challenge. Herein, we report that Ag salts coordinated with unique bis(oxazoline) ligands catalyze site- and enantioselective nitrene transfer into benzylic, allylic, and unactivated C–H bonds of carbamate esters. This method provides 1,3-aminoalcohols in high yields with enantiomeric excess (ee) of up to 98%. Computations were used to rationalize key features influencing the observed stereochemical outcomes. Analysis of the enantiodetermining transition states revealed that high ee arises from a preferred square-planar geometry at the silver nitrene and stabilizing C–H/π interactions between the ligand and substrate. These features enable broad substrate scope and high chemo-, site-, and enantioselectivity in Ag-catalyzed C–H bond amidations via nitrene transfer.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"31 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143933457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0