Chem Catalysis最新文献_第4页

Intermittent CO2 electrolysis needs its time in the sun 间歇式二氧化碳电解需要阳光下的时间

IF 9.4

Chem Catalysis Pub Date : 2024-11-06 DOI: 10.1016/j.checat.2024.101166

Izak Minnie, Hyunjik K. Kim, John Flake, Dongxia Liu

引用次数: 0

Discovery of the threshold potential that triggers photochemical water oxidation with Ru(II) photosensitizers and MOx catalysts 利用 Ru(II) 光敏剂和 MOx 催化剂发现引发光化学水氧化的阈值电位

IF 9.4

Chem Catalysis Pub Date : 2024-11-04 DOI: 10.1016/j.checat.2024.101167

Megumi Okazaki, Yasuomi Yamazaki, Daling Lu, Shunsuke Nozawa, Osamu Ishitani, Kazuhiko Maeda

{"title":"Discovery of the threshold potential that triggers photochemical water oxidation with Ru(II) photosensitizers and MOx catalysts","authors":"Megumi Okazaki, Yasuomi Yamazaki, Daling Lu, Shunsuke Nozawa, Osamu Ishitani, Kazuhiko Maeda","doi":"10.1016/j.checat.2024.101167","DOIUrl":"https://doi.org/10.1016/j.checat.2024.101167","url":null,"abstract":"Photochemical water oxidation in the presence of a Ru(II) photosensitizer to form O2 is one of the most studied reactions in (photo)catalysis for both homogeneous and heterogeneous systems. In the present work, several Ru(II)-tris-diimine-type complexes with different ligands were used under a wide pH range (3.7–9.4) and over different transition-metal oxide (MOx) catalysts to reveal the factors that govern the O2 evolution activity. Most importantly, the results clarified that a certain “threshold” potential determines whether water oxidation can proceed and that this potential is related to the energy barrier for electron transfer from the MOx catalyst to the Ru(II) photosensitizer. The results of this work highlight that the potential of the electrons involved in the water oxidation on MOx catalysts can be estimated through the simple application of a photochemical reaction, which will be a useful measure for assessing the water oxidation activity of suspended nanoparticle catalysts.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"62 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574614","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

Singly and doubly oxidized carbenes and their applications in catalysis 单氧化和双氧化碳烯及其在催化中的应用

IF 9.4

Chem Catalysis Pub Date : 2024-11-04 DOI: 10.1016/j.checat.2024.101159

Alexis K. Day, Mehdi Abdellaoui, Michèle Soleilhavoup, Guy Bertrand

引用次数: 0

The role of metal nanostructure in ceria-supported catalysts for ammonia oxidation to nitrous oxide 金属纳米结构在氨氧化成氧化亚氮的铈支撑催化剂中的作用

IF 9.4

Chem Catalysis Pub Date : 2024-10-31 DOI: 10.1016/j.checat.2024.101165

Ivan Surin, Qingxin Yang, Frank Krumeich, Mikhail Agrachev, Tatiana Otroshchenko, Vita A. Kondratenko, Evgenii V. Kondratenko, Javier Pérez-Ramírez

{"title":"The role of metal nanostructure in ceria-supported catalysts for ammonia oxidation to nitrous oxide","authors":"Ivan Surin, Qingxin Yang, Frank Krumeich, Mikhail Agrachev, Tatiana Otroshchenko, Vita A. Kondratenko, Evgenii V. Kondratenko, Javier Pérez-Ramírez","doi":"10.1016/j.checat.2024.101165","DOIUrl":"https://doi.org/10.1016/j.checat.2024.101165","url":null,"abstract":"Manganese (Mn) and chromium (Cr) catalysts supported on CeO2 enable direct ammonia oxidation to nitrous oxide, N2O, but the lack of synthesis-structure-performance relations hinders rational catalyst design. Herein, we generate a platform of CeO2-supported Mn and Cr catalysts, systematically varying the metal nanostructure from single atoms to nanoparticles, and the carrier redox properties, as confirmed by advanced characterization methods. Surface reducibility of CeO2 emerges as a general descriptor, controlling N2O productivity. Conversely, structure sensitivity is metal specific, with Mn-based systems achieving high N2O selectivity in single-atom and nanoparticle forms, while the selectivity of Cr-based systems is dependent on metal dispersion. In situ UV-visible (UV-vis), steady-state, and transient kinetic studies unveil the ability of redox-active MnOx to synergize with CeO2 and enhance oxygen transport for the reaction following a Mars-van Krevelen mechanism. This work provides fundamental insights into the role and function of each catalyst component and guidelines for the development of improved N2O synthesis catalysts.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"6 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142556100","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

Engineering intricacies of implementing single-atom alloy catalysts for low-temperature electrocatalytic CO2 reduction 实施单原子合金催化剂用于低温电催化二氧化碳还原的工程复杂性

IF 9.4

Chem Catalysis Pub Date : 2024-10-29 DOI: 10.1016/j.checat.2024.101164

Isaac Kojo Seim, Manjeet Chhetri, John-Paul Jones, Ming Yang

{"title":"Engineering intricacies of implementing single-atom alloy catalysts for low-temperature electrocatalytic CO2 reduction","authors":"Isaac Kojo Seim, Manjeet Chhetri, John-Paul Jones, Ming Yang","doi":"10.1016/j.checat.2024.101164","DOIUrl":"https://doi.org/10.1016/j.checat.2024.101164","url":null,"abstract":"Catalysts research for electrocatalytic CO2 reduction reactions (CO2R) has undergone rapid growth in the last decade. Single-atom alloy catalysts (SAAs) featuring atomically dispersed metal dopants on host metal surfaces have shown promises in boosting CO2R yield by optimizing the structure and synergy of the catalytic metals at the atomic scale. Despite the exciting development of SAAs for CO2R in fundamental science, dedicated studies for its engineering implementation have been absent. We use this perspective to discuss our non-exhaustive engineering considerations for implementing SAAs for CO2R. The perspective starts with a brief overview of the current research status for SAAs in CO2R, followed by focal points on structure uncertainties associated with catalyst manufacturing, catalyst layer degradation during reaction, and possibilities for SAAs to mitigate the salt precipitation issue at the device level. We hope our opinions will engage increasing attention toward the engineering catalysis research for applying SAAs to CO2R at scale.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"15 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536538","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

Discrimination between OH− and H2O oxidation for oxygen evolution reaction 区分氧进化反应中的 OH- 氧化和 H2O 氧化

IF 9.4

Chem Catalysis Pub Date : 2024-10-28 DOI: 10.1016/j.checat.2024.101157

Mengjun Xiao, Qianbao Wu, Hongfei Liu, Xia Zheng, Lei Li, Wei Wang, Chunhua Cui

{"title":"Discrimination between OH− and H2O oxidation for oxygen evolution reaction","authors":"Mengjun Xiao, Qianbao Wu, Hongfei Liu, Xia Zheng, Lei Li, Wei Wang, Chunhua Cui","doi":"10.1016/j.checat.2024.101157","DOIUrl":"https://doi.org/10.1016/j.checat.2024.101157","url":null,"abstract":"OH−/H2O-reactant discrimination for the oxygen evolution reaction (OER) is a critical but not well resolved issue. This has led to unreasonable activity comparisons, misinterpreted OER mechanisms, and ununified models for theoretical calculations regardless of the thermodynamic/kinetic difference between OH− and H2O oxidation. Here, we discriminate between OH− and H2O oxidation by tuning the interfacial OH− concentration. Combining OER kinetic analysis with in situ 16OH−/H218O isotopic labeling-based differential electrochemical mass spectrometry, we examine the respective electrochemical oxidation behaviors between OH− and H2O oxidation. We find that OH− oxidation presents ∼550 mV lower onset potential relative to H2O oxidation and that Tafel plotting gives slopes of ∼50 mV dec−1 for OH− oxidation, which is substantially lower than those of ∼200 mV dec−1 for H2O oxidation on a model CoOOH catalyst. This work calls for the discrimination of OH−/H2O oxidation as the prerequisite for future OER activity evaluation and mechanism studies.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"49 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142519379","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

An electrocatalytic oxidative approach to synthesis urea 电催化氧化法合成尿素

IF 9.4

Chem Catalysis Pub Date : 2024-10-28 DOI: 10.1016/j.checat.2024.101181

Shuangyin Wang

引用次数: 0

Practical and modular cycloadditions of in-situ formed exocyclic vinylcarbenes 原位形成外环乙烯基烯烃的实用模块化环化反应

IF 9.4

Chem Catalysis Pub Date : 2024-10-25 DOI: 10.1016/j.checat.2024.101163

Cheng Zhang, Shanliang Dong, Martin C. Dietl, Matthias Rudolph, Xinke Zhang, Kemiao Hong, Wei Yi, A. Stephen K. Hashmi, Xinfang Xu

引用次数: 0

Boosting photocatalytic water oxidation on lead chromate through crystal facet engineering 通过晶面工程提高铬酸铅的光催化水氧化能力

IF 9.4

Chem Catalysis Pub Date : 2024-10-25 DOI: 10.1016/j.checat.2024.101153

Wenchao Jiang, Chenwei Ni, Yejun Xiao, Yue Zhao, Chu Han, Xuan Wu, Chengbo Zhang, Haibo Chi, Rengui Li, Can Li

{"title":"Boosting photocatalytic water oxidation on lead chromate through crystal facet engineering","authors":"Wenchao Jiang, Chenwei Ni, Yejun Xiao, Yue Zhao, Chu Han, Xuan Wu, Chengbo Zhang, Haibo Chi, Rengui Li, Can Li","doi":"10.1016/j.checat.2024.101153","DOIUrl":"https://doi.org/10.1016/j.checat.2024.101153","url":null,"abstract":"Although crystal facet engineering of semiconductor crystals has been demonstrated to be effective in particulate photocatalysts for solar energy conversion, it is imperative to rationally regulate the exposed crystal facets and their configurations to improve charge separation efficiency. In this study, focusing on visible-light-driven water oxidation photocatalyst lead chromate (PbCrO4), we find that a flux-assisted treatment enables the precise tuning of the hole-accumulating facets of anisotropic PbCrO4 crystal, transitioning the top surface from {−101} to {001} facets while preserving its spatial charge separation characteristics. Owing to the superior hole-accumulating property and water oxidation kinetics of the {001} facets, the resulting Flux-PbCrO4 crystals achieve a charge separation efficiency exceeding 75%, leading to a remarkable improvement in photocatalytic water oxidation activity. Further incorporation of cocatalysts onto the Flux-PbCrO4 crystals results in an apparent quantum efficiency of 18.5% at 500 nm for photocatalytic water oxidation.","PeriodicalId":53121,"journal":{"name":"Chem Catalysis","volume":"6 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142489834","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

Expanding the repertoire of imine reductases by mining divergent biosynthetic pathways for promiscuous reactivity 通过挖掘不同生物合成途径的杂合反应性，扩大亚胺还原酶的范围

IF 9.4

Chem Catalysis Pub Date : 2024-10-24 DOI: 10.1016/j.checat.2024.101160

Godwin A. Aleku, Florian Hollfelder

引用次数: 0