ChemCatChem最新文献_第5页

Cover Feature: Bifunctional Strontium Cobalt Molybdenum Oxide (Sr2CoMoO6) Perovskite as an Efficient Catalyst for Electrochemical Water Splitting Reactions in Alkaline Media (ChemCatChem 17/2024) 封面专题：双功能锶钴钼氧化物（Sr2CoMoO6）包晶作为碱性介质中电化学水分离反应的高效催化剂（ChemCatChem 17/2024）

IF 3.8 3区化学

ChemCatChem Pub Date : 2024-09-09 DOI: 10.1002/cctc.202481702

Shahan Atif, Abhisek Padhy, Pawan Kumar Jha, Dorothy Sachdeva, Dr. Prabeer Barpanda

{"title":"Cover Feature: Bifunctional Strontium Cobalt Molybdenum Oxide (Sr2CoMoO6) Perovskite as an Efficient Catalyst for Electrochemical Water Splitting Reactions in Alkaline Media (ChemCatChem 17/2024)","authors":"Shahan Atif, Abhisek Padhy, Pawan Kumar Jha, Dorothy Sachdeva, Dr. Prabeer Barpanda","doi":"10.1002/cctc.202481702","DOIUrl":"https://doi.org/10.1002/cctc.202481702","url":null,"abstract":"<p><b>The Cover Feature</b> highlights the concept that, for water-splitting reaction and related clean energy technology, it is imperative to design earth-abundant low-cost electrocatalysts. In this spirit, the work by Abhisek Padhy, Prabeer Barpanda, and co-workers introduces double perovskite-based strontium cobalt molybdenum oxide (SCMO) as an efficient bifunctional electrocatalyst showing both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Prepared by scalable autocombustion synthesis, the bulk SCMO perovskite exhibits stable electrocatalytic performance attributed to its substantial electrochemical active surface area. Double perovskite electrocatalysts can be harnessed for sustainable energy technologies. More information can be found in the Research Article by Shahan Atif et al. (DOI: 10.1002/cctc.202400217).\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure>\u0000 </p>","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"16 17","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202481702","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142165619","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

Heteroatom‐Containing Zeolites as Solid Lewis Acid Catalysts for the Cycloaddition of CO2 to Epoxides 含异构体的沸石作为二氧化碳与环氧化物环化反应的固体路易斯酸催化剂

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-09 DOI: 10.1002/cctc.202401385

Bohai Gao, Weijie Li, Yuchao Chai, Guangjun Wu, Landong Li

{"title":"Heteroatom‐Containing Zeolites as Solid Lewis Acid Catalysts for the Cycloaddition of CO2 to Epoxides","authors":"Bohai Gao, Weijie Li, Yuchao Chai, Guangjun Wu, Landong Li","doi":"10.1002/cctc.202401385","DOIUrl":"https://doi.org/10.1002/cctc.202401385","url":null,"abstract":"The catalytic cycloaddition of CO2 to epoxides to produce valuable cyclic carbonates represents a simple and promising strategy for CO2 utilization, circumventing the ineffective CO2 reduction process. Despite current progresses, there remains an impending demand for highly‐active, cost‐effective and stable catalysts especially the ideal heterogeneous catalytic systems. Herein, we report the preparation of heteroatom‐containing zeolites through a two‐step process comprising of framework dealumination and subsequent heteroatom incorporation, and their catalytic applications in CO2 cycloaddition to epoxides. Characterization results reveal the successful incorporation of heteroatoms into framework to derive Lewis acidic M‐Beta zeolites (M=Ti, Zr or Hf). The as‐prepared M‐Beta Lewis acids show remarkable performance in the model reaction of CO2 cycloaddition to propylene oxide with the assistance of potassium iodide under solvent‐free conditions. The reaction parameters have been optimized employing Ti‐Beta catalyst and the substrate scope has been investigated. Finally, the impact of Lewis acidity on the cycloaddition reaction is discussed and the actual bifunctional Ti‐Beta/KI catalyst system is proposed, which is of important significance for the understanding of CO2 catalytic cycloaddition to epoxides.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"47 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208896","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

Exploring Dinuclear Titanium Complexes in Titanium(III) Catalysis 探索钛（III）催化中的双核钛配合物

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-09 DOI: 10.1002/cctc.202401337

Michael A Unkrig-Bau, Sara L Leijendekker, Jan Streuff

引用次数: 0

Effects of Acid Sites on Thin MCM‐22 Zeolite Catalysts and Their Catalytic Applications for Acetylene Aromatization 酸性位点对薄型 MCM-22 沸石催化剂的影响及其在乙炔芳香化中的催化应用

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-09 DOI: 10.1002/cctc.202401302

Jinju Hong, Jonghyun Jeon, Hee Hwan Kim, Kyung Soo Shin, Sung June Cho, Kyoung-Su Ha

{"title":"Effects of Acid Sites on Thin MCM‐22 Zeolite Catalysts and Their Catalytic Applications for Acetylene Aromatization","authors":"Jinju Hong, Jonghyun Jeon, Hee Hwan Kim, Kyung Soo Shin, Sung June Cho, Kyoung-Su Ha","doi":"10.1002/cctc.202401302","DOIUrl":"https://doi.org/10.1002/cctc.202401302","url":null,"abstract":"Two types of thin zeolite MCM‐22 catalysts were prepared by using a carbon sphere template. By different calcination methods, a hollow sphere‐type MCM‐22 (HS‐MCM‐22) and a nanosheet‐type MCM‐22 (NS‐MCM‐22) were synthesized. Those catalysts were tested and evaluated for acetylene aromatization to see the effects of thin structures. The two types of thin catalysts were found to have higher amount of acid sites than that of the conventional MCM‐22 catalyst. It was found that the extremely short diffusion length not only enhanced the aromatic yield, but also suppressed the formation of graphitic coke. Notably, the diffusion length of NS‐MCM‐22 was found to be at least 15 times shorter than that of conventional MCM‐22, leading to an 11 % and 18 % increase in benzene yield, respectively. The thin structure seemed to help the produced aromatics efficiently desorb before they further converted into carbon precursors and coke. The carbon species in the spent thin catalysts were found less graphitic than that of the conventional MCM‐22 catalyst. Because of this, the thin MCM‐22 catalysts were believed to show higher coke removal capability. Especially, the coke removal rate of NS‐MCM‐22 was estimated over 90% despite the severe carbon deposition during reaction.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"55 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208897","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

[Rh2(phesp)2]: a Bulkier [Rh2(esp)2] Analog to Tune the Site‐Selectivity in Carbene C–H Insertion Reactions [Rh2(phesp)2]：在碳烯 C-H 插入反应中调节位点选择性的更笨重的[Rh2(esp)2]类似物

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-06 DOI: 10.1002/cctc.202400874

Agnès Labande, Illia Ruzhylo, Anna Vorozhbian, Sandrine Vincendeau, Tanguy Saget, Sonia Mallet-Ladeira, Philippe Dauban, Eric Manoury

引用次数: 0

Oxidase‐like nanozyme activity of ultrathin copper metal‐organic framework nanosheets with high specificity for catechol oxidation 对儿茶酚氧化具有高度特异性的超薄金属有机框架铜纳米片的类氧化酶活性

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-06 DOI: 10.1002/cctc.202401029

Ajit Kumar Singh, Deepika Sharma, Devesh Kumar Singh, Sonu Sarraf, Aviru Kumar Basu, Vellaichamy Ganesan, Avishek Saha, Arindam Indra

引用次数: 0

Synthesis of Coke‐Resistant Catalyst Using NiAl2O4 Support for Hydrogen Production via Autothermal Dry Reforming of Methane 使用 NiAl2O4 支持物合成抗焦催化剂，用于通过甲烷自热干法转化制取氢气

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-06 DOI: 10.1002/cctc.202401015

Yasin Khani, Sumin Pyo, Farzad Bahadoran, Kanghee Cho, Kwang-Eun Jeong, Young-Kwon Park

{"title":"Synthesis of Coke‐Resistant Catalyst Using NiAl2O4 Support for Hydrogen Production via Autothermal Dry Reforming of Methane","authors":"Yasin Khani, Sumin Pyo, Farzad Bahadoran, Kanghee Cho, Kwang-Eun Jeong, Young-Kwon Park","doi":"10.1002/cctc.202401015","DOIUrl":"https://doi.org/10.1002/cctc.202401015","url":null,"abstract":"A highly porous NiAl2O4 spinel structure was synthesized and employed as a support for catalysts in the autothermal dry reforming of methane (ATDRM) in a monolithic‐type reactor. A series of catalyst with various metal species, X/NiAl2O4@monolith (X: Ni, Co, Pt, Rh, and Ru), was prepared. NiAl2O4 support provides a high dispersion of active metal species with a uniform size distribution, due to its high surface area, and large pore volume. These features enable catalysts to maximize catalytic performance by improving the adsorption and reaction rates of reactants. More notably, the use of NiAl2O4 support enhanced catalyst longevity by retarding coke formation during the ATDRM, due to its improved catalyst acidity compared to conventional alumina support. The conversion of feeed, CH4 and CO2 on X/NiAl2O4 catalysts increases in the order of Rh > Ni > Ru > Co > Pt. Notably, the inexpensive Ni catalyst exhibits slightly lower but comparable CH4 conversion to the expensive noble metal Rh when using NiAl2O4 as a supporting material: 93.7% for Ni vs. 95.2% for Rh. Moreover, applying monolithic reactors considerably increased methane conversion compared with fixed bed reactors due to the better distribution of active metal, increased activity per unit volume, high mass/heat transfer.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"9 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208740","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

Pd nanoparticle supported on N‐doped carbon derived from sodium alginate/melamine blends as efficient heterogeneous catalyst for Heck reactions 海藻酸钠/三聚氰胺混合物衍生的掺杂 N 的碳上支持的钯纳米粒子作为 Heck 反应的高效异相催化剂

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-05 DOI: 10.1002/cctc.202401358

Jie Zhou, Yuanyuan Wu, Yonghong Liu, Na Li, Zhen Yang, Jiadi Ying, Xiaorong Ren, Tao Zhang, Wei Xu, Jinyang Chen, Xingzhong Cao, Runsheng Yu, Minfeng Zeng

{"title":"Pd nanoparticle supported on N‐doped carbon derived from sodium alginate/melamine blends as efficient heterogeneous catalyst for Heck reactions","authors":"Jie Zhou, Yuanyuan Wu, Yonghong Liu, Na Li, Zhen Yang, Jiadi Ying, Xiaorong Ren, Tao Zhang, Wei Xu, Jinyang Chen, Xingzhong Cao, Runsheng Yu, Minfeng Zeng","doi":"10.1002/cctc.202401358","DOIUrl":"https://doi.org/10.1002/cctc.202401358","url":null,"abstract":"N‐doped porous carbon shows great potential in the field of heterogenous supports due to its high porosity, large surface area, rich active sites, and strong chelation with catalytic active metals species. Here, we successfully fabricated novel N‐doped porous carbon derived from alginate/melamine blends with different mass ratio by simple carbonization and activation process. Hierarchical porous structure of the derived N‐doped carbon has been confirmed with the SEM, TEM and N2 adsorption characterization. After Na2PdCl4 solution impregnation and further reduction process, Pd0 nanoparticles have been uniformly immobilized on the SMCNC support to produce novel Pd@SAMNC catalyst. The optimated Pd@SAMNC‐0.6 possesses a high N content (5.13%), Pd content (5.90%), large BET specific surface area of 1884.5 m2/g. Positron annihilation lifetime spectroscopy (PALS) investigation of the porous carbon materials provided the sub‐nano level microporous information proofs of Pd@SAMNC‐0.6 had the capability to provide more active sites for reactions than commercial Pd@AC. Pd@SAMNC‐0.6 catalyst showed superior catalytic efficiency in Heck coupling reaction between aromatic halides and alkenes and can be recycled for 17 runs without significant decrease in catalytic efficiency.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"7 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208901","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

Unlocking a Key Residue in a Lipase for Efficient Polyethylene Terephthalate (PET) Hydrolysis and Influencing Depolymerization Product Profiles 揭示脂肪酶中用于高效水解聚对苯二甲酸乙二酯 (PET) 的关键残基并影响解聚的产品概况

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-05 DOI: 10.1002/cctc.202400765

Paula Vidal, Ana Robles-Martín, Laura Fernandez-Lopez, Jose L. Gonzalez-Alfonso, David Almendral, Ruben Muñoz-Tafalla, Francisco J. Plou, Víctor Guallar, Manuel Ferrer

{"title":"Unlocking a Key Residue in a Lipase for Efficient Polyethylene Terephthalate (PET) Hydrolysis and Influencing Depolymerization Product Profiles","authors":"Paula Vidal, Ana Robles-Martín, Laura Fernandez-Lopez, Jose L. Gonzalez-Alfonso, David Almendral, Ruben Muñoz-Tafalla, Francisco J. Plou, Víctor Guallar, Manuel Ferrer","doi":"10.1002/cctc.202400765","DOIUrl":"https://doi.org/10.1002/cctc.202400765","url":null,"abstract":"Polyethylene terephthalate (PET) pollution is a global challenge. Advancing the bioprospecting of PET‐degrading enzymes through metagenomics and using computational and functional methods to identify key positions influencing the catalytic rate and selectivity are part of the solution. Here, we report PETase activity in the metagenomic lipase LipMRD9, which exhibits peak activity at 30 °C and pH 9.0 and has a denaturation temperature of 42 °C. In addition to acting on long‐chain triglycerides (up to 13 units (U)/mg, pH 8.0, 30 °C) and a wide range of 34 other esters (up to 228 U/g), LipMRD9 hydrolyses mono(2‐hydroxyethyl) terephthalate (57 U/g) and bis(2‐hydroxyethyl) terephthalate (131 U/g). It also efficiently deconstructs GoodFellow amorphous submicro‐ and nanosized PET particles (984/2238 µM degradation products at 30/40 °C, pH 7.0, 21.5 h) and films (112/198 µM degradation products at 30/40 °C, pH 7.0, 7 days). Through molecular modelling and experimental analysis, the active site of LipMRD9 was revealed, identifying a key residue contributing to its PETase activity compared with those of its closest homologues. This residue plays a crucial role in determining the distinct profiles of degradation products from PET hydrolysis and should be studied in other PETases for its influence on the catalytic process.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"21 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208902","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

Ce‐Pr co‐doped Co3O4 with enriched oxygen vacancies for the efficient decomposition of N2O 具有富氧空位的 Ce-Pr 共掺杂 Co3O4 可高效分解 N2O

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-09-05 DOI: 10.1002/cctc.202401060

Haiqiang Wang, Yuxin Sun, Yunshuo Wu, Zhuoyi Zhang, Xuanhao Wu, Zhongbiao Wu

{"title":"Ce‐Pr co‐doped Co3O4 with enriched oxygen vacancies for the efficient decomposition of N2O","authors":"Haiqiang Wang, Yuxin Sun, Yunshuo Wu, Zhuoyi Zhang, Xuanhao Wu, Zhongbiao Wu","doi":"10.1002/cctc.202401060","DOIUrl":"https://doi.org/10.1002/cctc.202401060","url":null,"abstract":"Nitrous oxide (N2O) has gained increasing attention as a non‐carbon dioxide greenhouse gas, and catalytic decomposition is an effective method for mitigating its emissions. In this study, Ce‐Pr co‐doped Co3O4 was synthesised via a coprecipitation method and used for the catalytic decomposition of N2O. The experimental results revealed that the N2O decomposition achieved 100% conversion at 400 °C on the catalyst with a Pr/Ce/Co molar ratio of 0.02:0.2:1, exhibiting an 80 °C decrease of T100 compared with that of Co3O4. The introduction of Ce reduced the size and crystallisation of Co3O4 particles, increased the activity of the lattice oxygen of Co3O4, and facilitated the formation of oxygen vacancies, thereby enhancing the activation of N2O. However, the introduction of Ce inhibited the crystallisation of Co3O4 and the surface coverage of CeO2 decreased the exposure degree of N2O molecules to the Co3O4 surface. Co‐doping strategy of Ce‐Pr was performed to alleviate the negative effects of ceria. Consequently, the incorporation of Ce and Pr species enhanced the redox properties of Co3O4, leading to remarkable catalytic performance of N2O decomposition. This study elucidated the interaction between Ce and Pr dopants and Co3O4, and encouraged more attention on designing novel catalysts for N2O mitigation.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"11 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208742","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