ChemCatChem最新文献_第10页

Optimizing Electron Configuration of Cobalt-Based Cocatalysts Supported by Carbon Nitride Nanosheets to Achieve Enhanced Photocatalytic Water Oxidation 优化氮化碳纳米片负载钴基助催化剂的电子构型以实现增强光催化水氧化

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-18 DOI: 10.1002/cctc.202500371

Dr. Mingwen Zhang, Kai Yu, Dr. Wei Ren, Dr. Yun Zheng, Dr. Yilin Chen, Dr. Jintian Cheng, Dr. Zhaoyu Wang, Prof. Zhi-An Lan

引用次数: 0

Cu(I)-Enriched Hierarchical HKUST-1/GO Composite: A Recyclable Catalyst for Green Azide–Alkyne Click Reactions Cu(I)-富集层次化HKUST-1/GO复合材料：绿色叠氮化物-炔咔嗒反应的可回收催化剂

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-18 DOI: 10.1002/cctc.202500163

Murtaza Manzoor Bhat, Bilal Ahmad Ganaie, Tabasum Ismail, Feroz Ahmad Sofi, Mohammad Yaseen Kuchey, Aamir Yaseen Bhat, Syed Shafi, Pravin P. Ingole, Mohsin Ahmad Bhat

{"title":"Cu(I)-Enriched Hierarchical HKUST-1/GO Composite: A Recyclable Catalyst for Green Azide–Alkyne Click Reactions","authors":"Murtaza Manzoor Bhat, Bilal Ahmad Ganaie, Tabasum Ismail, Feroz Ahmad Sofi, Mohammad Yaseen Kuchey, Aamir Yaseen Bhat, Syed Shafi, Pravin P. Ingole, Mohsin Ahmad Bhat","doi":"10.1002/cctc.202500163","DOIUrl":"https://doi.org/10.1002/cctc.202500163","url":null,"abstract":"A simple and scalable template-assisted strategy for synthesis of graphene oxide (GO)-supported HKUST-1 MOF composite (HKUST-1/GO) as an efficient, recyclable, heterogeneous catalyst for azide-alkyne “Click” reaction is presented. Field emission scanning electron microscopy, powder X-ray diffraction, and X-ray photoelectron spectroscopy analysis suggest that the use of GO as a synthetic template promotes the growth of Cu(I)-rich hierarchical MOF structures with elongated, regular cuboidal shapes. Catalytic investigations over room temperature reaction of α-naphthyl azide with phenylacetylene-as a model azide-alkyne cycloaddition (AAC) click reaction, reveal the outstanding catalytic performance and recyclability of the HKUST-1/GO composite. Besides the model AAC reaction, the HKUST-1/GO composite is demonstrated to exhibit exceptionally high catalytic performance toward cycloaddition reaction of various sterically challenging and biologically relevant azide-alkyne systems. Our investigations demonstrate that the templated growth of Cu-MOF over GO imparts it with mixed valence active Cu catalytic sites, improved electronic conductivity, and a unique morphology that enables rapid analyte transport. These GO-induced features confer excellent stability, recyclability, and activity to the HKUST-1/GO composite. The exceptional catalytic performance, ease of recovery, and excellent recyclability as demonstrated for HKUST-1/GO composite in the present work position it as a cost-effective, efficient, and reusable heterogeneous catalyst for AAC click reactions.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367384","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

Energy Transfer Enabled Radical Deoxygenative C(sp3)-N Construction 能量转移激活自由基脱氧C(sp3)-N结构

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-18 DOI: 10.1002/cctc.202500317

Xiao-Ting Liu, Yue-Ming Cai, Shu-Rong Ban, Ming Shang

引用次数: 0

In-Pt Supported Catalytically Active Liquid Metal Solutions for Propane Dehydrogenation – Role of Surface Acidity of Support In-Pt负载的丙烷脱氢催化活性液态金属溶液——载体表面酸度的作用

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-18 DOI: 10.1002/cctc.202402096

Moritz Wolf, Thomas Gradl, Shaine Raseale, Aleksandr Maliugin, Narayanan Raman, Patrick Schühle, Nicola Taccardi, Michael Claeys, Dmitry I. Sharapa, Felix Studt, Nico Fischer, Marco Haumann, Peter Wasserscheid

{"title":"In-Pt Supported Catalytically Active Liquid Metal Solutions for Propane Dehydrogenation – Role of Surface Acidity of Support","authors":"Moritz Wolf, Thomas Gradl, Shaine Raseale, Aleksandr Maliugin, Narayanan Raman, Patrick Schühle, Nicola Taccardi, Michael Claeys, Dmitry I. Sharapa, Felix Studt, Nico Fischer, Marco Haumann, Peter Wasserscheid","doi":"10.1002/cctc.202402096","DOIUrl":"https://doi.org/10.1002/cctc.202402096","url":null,"abstract":"Propane dehydrogenation is a dynamic catalytic application associated with rapid deactivation due to coking. Supported catalytically active liquid metal solutions (SCALMS) have been demonstrated to suppress coking due to the highly dynamic active sites at the liquid metal–gas interface. Herein, the parent catalysts for In-Pt SCALMS were prepared by impregnation using a series of alumina supports with various surface acidity. Reduction in hydrogen results in the formation of a supported liquid In-rich alloy, which was studied using in situ X-ray diffraction. The concentration profile of Pt is modeled via machine learning force field molecular dynamics simulation confirming an enrichment of Pt below the surface of the liquid alloy. The SCALMS with the least acidic alumina support results in a superior performance during propane dehydrogenation. In situ high-resolution thermogravimetric analysis coupled with mass spectrometry indicates enhanced coking with increasing alumina acidity, while comparison with a Pt/Al2O3-supported catalyst highlights the coking resistance of SCALMS.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202402096","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367382","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

Phosphino(silyl) Nickel Complexes for Alkene Hydroboration Catalysis: Steric Tuning of Pre-Catalyst Provides High Regioselectivity 膦（硅基）镍配合物用于烯烃氢硼化催化：预催化剂的空间调谐提供高区域选择性

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-17 DOI: 10.1002/cctc.202500376

Xue Tang, Yiwen Feng, Deidre Tremblay, Dr. Katherine N. Robertson, Prof.Dr. Laura Turculet

引用次数: 0

Sol–Gel Synthesized Co-Doped Ilmenite-NiTiO3 for Oxygen Evolution Reaction: Interplay of Inductive Effect and Crystal Structure 溶胶-凝胶法制备钛铁矿- nitio3共掺杂析氧反应：诱导效应与晶体结构的相互作用

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-17 DOI: 10.1002/cctc.202500396

Shraddha Jaiswal, Subash Chandra Gupta, Asha Gupta

{"title":"Sol–Gel Synthesized Co-Doped Ilmenite-NiTiO3 for Oxygen Evolution Reaction: Interplay of Inductive Effect and Crystal Structure","authors":"Shraddha Jaiswal, Subash Chandra Gupta, Asha Gupta","doi":"10.1002/cctc.202500396","DOIUrl":"https://doi.org/10.1002/cctc.202500396","url":null,"abstract":"The oxygen evolution reaction is key to advancing hydrogen production, energy storage, and sustainable energy technologies. In this study, we have explored the ilmenite-type Co-substituted NiTiO3 as a promising OER catalyst in the alkaline electrolyte. Synergistic interaction between Ni and Co generates the inductive effect which enhances the ionicity of Ni─O bond leading to a greater overlap between Ni(3d) and O(2p) orbitals, resulting in a higher OER activity of the doped catalysts. Further presence of surface active Co3+ in the ilmenite structure plays a key role in the enhancement of OER activity of the catalyst. A systematic investigation of the OER activity of Ni1-xCoxTiO3 (0 < x < 0.25) with different amounts of Co doping synthesized via sol–gel method is reported here. Among the compositions investigated, Ni0.825Co0.175TiO3 is the most active as it exhibits excellent activity with a Tafel slope of 56 mV dec−1 and a overpotential of 395 mV at 10 mA cm−2. This work presents the role of the inductive effect originating due to the difference in the electronegativity of neighboring cations, leading to alteration of the redox energies and facilitating the effective electron transfer required for the electrocatalytic OER, which can be further utilized to develop superior electrocatalysts.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367154","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

Effect of the Aromatic Content of Organosilica Supports on Aqueous Phase Phenol Hydrogenation 有机二氧化硅载体芳香族含量对水相苯酚加氢的影响

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-17 DOI: 10.1002/cctc.202500344

Anagha Hunoor, Snehal Patil, Emily Naughton, James Nana Gyamfi, Chidimma Maryjane Nwankwor, Dr. Dan Conroy, Tanay Jawdekar, Dr. Seval Gunduz, Dr. Paul L. Edmiston, Dr. Umit S. Ozkan

引用次数: 0

Zeolite Catalysts for Hydrogen Harvesting from Polyethylene: A Sustainable Approach to Plastic Waste Upgrading 沸石催化剂用于从聚乙烯中收集氢：一种可持续的塑料废物升级方法

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-17 DOI: 10.1002/cctc.202500592

Louwanda Lakiss, Houeida Issa Hamoud, Hugo Cruchade, Hristina Lazarova, Malak Qassab, Marie Desmurs, Mohamad El Roz, Valentin Valtchev, Jean-Pierre Gilson

{"title":"Zeolite Catalysts for Hydrogen Harvesting from Polyethylene: A Sustainable Approach to Plastic Waste Upgrading","authors":"Louwanda Lakiss, Houeida Issa Hamoud, Hugo Cruchade, Hristina Lazarova, Malak Qassab, Marie Desmurs, Mohamad El Roz, Valentin Valtchev, Jean-Pierre Gilson","doi":"10.1002/cctc.202500592","DOIUrl":"https://doi.org/10.1002/cctc.202500592","url":null,"abstract":"This study aims to produce hydrogen from polyolefin plastics, using nickel zeolite-based catalysts under inert conditions. Low density polyethylene (LDPE) has been chosen as a model for upgrading polyolefin plastic wastes. Zeolites with a large variety of physicochemical properties have been investigated including large pores beta (BEA/BEB), faujasite (FAU), mordenite (MOR), and the intermediate pore ZSM-5 (MFI). All have been impregnated with nickel to enhance catalytic hydrogen production. Their catalytic performance was assessed through LDPE conversion in a fixed bed reactor under nitrogen flow as well as in a combined TGA-MS setup. All catalysts performed better, that is, at lower temperatures than under thermal decomposition. Ni-LZY-210, Ni-Beta, and Ni-CBV712 are active at low temperatures (∼250 °C) with a high hydrogen selectivity (40–50 mol.% of the gas phase). They also exhibit different selectivity toward isobutane and heavier hydrocarbons (C6+). The composition of the condensed products depends also of the zeolite: with Ni-Beta, the primary products are alkyl benzenes (C8-13), while Ni-CBV712 produces approximately 30 wt.% of branched alkanes in the C8-10 range and Ni-LZY-210 predominantly yields aromatic compounds in the C8-10 range. The coke deposit varies also in the range of 2–20 wt%. The presence of nickel is essential for hydrogen production. In the absence of nickel the yield of hydrogen ranges from 1% to 7% for pure zeolite-based catalysts.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367155","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

Potassium Tert-butoxide Mediated Benzyl Radical Generation From Halo Compounds and Multi-Component Reactions With Selenourea and Carboxylic Acids for the Synthesis of Selenoesters 叔丁二氧化钾介导的光晕化合物生成苄基自由基及与硒脲和羧酸的多组分反应合成硒酸酯

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-17 DOI: 10.1002/cctc.202500123

Moumita Khanra, Mouzma Mhate, Sharada Prasanna Swain

{"title":"Potassium Tert-butoxide Mediated Benzyl Radical Generation From Halo Compounds and Multi-Component Reactions With Selenourea and Carboxylic Acids for the Synthesis of Selenoesters","authors":"Moumita Khanra, Mouzma Mhate, Sharada Prasanna Swain","doi":"10.1002/cctc.202500123","DOIUrl":"https://doi.org/10.1002/cctc.202500123","url":null,"abstract":"Selenoesters are precursors for Native Chemical Ligation (NCL), and diselenide-selenoester ligation (DSL), which are essential chemical processes for protein synthesis. They also act as synthons for the generation of acyl radicals, hydrogen selenide, and selenoacids. Selenoesters can potentially be used to prepare amino acid conjugates via amidation reaction. Generally, selenoesters synthesis from carboxylic acids involves two steps, conversion to acyl chlorides and followed by reaction with diselenides. A new multicomponent reaction for the synthesis of selenoesters directly from carboxylic acids, selenourea, alkyl/aryl/allyl halides is reported. Potassium-tert-butoxide (t-BuOK) acts as a radical initiator for generation of benzyl radicals from halo compounds under microwave heating. Selenourea acted as source of selenium, and potassium-tert-butoxide played dual role, as a base and a radical initiator. A new reaction mechanism is proposed and the reaction proceeds via a benzyl radical intermediate. The radical intermediate was trapped by a radical quencher (2,2,6,6-Tetramethylpiperidin-1-yl)oxyl (TEMPO) and it was isolated, characterized by 1H and 13C NMR in order to prove the proposed new mechanism. The selenoesters were isolated in a moderate to good yields, and the reaction is well tolerated with several aromatic carboxylic acids. The reaction was also suitable for benzylic and allylic halo compounds, and aryl sulfonates.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367152","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

Optimization of Active Sites in TiO2–Cu Photocatalysts for H2 Generation via Cellulose Photo-Reforming 纤维素光重整制氢TiO2-Cu光催化剂活性位点的优化

IF 3.8 3区化学

ChemCatChem Pub Date : 2025-04-17 DOI: 10.1002/cctc.202500250

Sergio Belda-Marco, María Ángeles Lillo-Ródenas, María Carmen Román-Martínez

{"title":"Optimization of Active Sites in TiO2–Cu Photocatalysts for H2 Generation via Cellulose Photo-Reforming","authors":"Sergio Belda-Marco, María Ángeles Lillo-Ródenas, María Carmen Román-Martínez","doi":"10.1002/cctc.202500250","DOIUrl":"https://doi.org/10.1002/cctc.202500250","url":null,"abstract":"The study pursues the optimization of active sites in TiO2-based photocatalysts modified with copper for hydrogen production via cellulose photo-reforming. Copper was incorporated, by impregnation, in the commercial titania P25 and in hydrothermally synthesized TiO2 which has a larger surface area and contains only anatase. The hydrothermal synthesis method was also employed for the one-pot preparation of TiO2–Cu photocatalysts. The effect of the copper loading was investigated in the three series of samples. Characterization techniques, including XPS, XRD, UV–vis, and PL spectroscopy, confirmed structural and electronic modifications induced by Cu incorporation, which would directly influence the photocatalytic efficiency. The activity tests demonstrated a significant enhancement in H₂ evolution upon Cu loading, being the photocatalysts prepared by the one-pot method the most active ones for hydrogen generation, with the highest H2/CO2 ratio and leading to the highest concentration of sugars and organic acids in solution, compared with the catalysts prepared by impregnation. The superior performance of these photocatalysts has been attributed to their increased surface area that allows a higher Cu loading with optimised distribution of active sites. In particular, the catalysts with 3 wt% Cu is the one exhibiting the highest efficiency, producing 2752 µmol·h⁻¹·gcat⁻¹, and being recyclable.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"17 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cctc.202500250","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367150","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