ChemCatChem最新文献_第8页

Pd/PVP‐Catalyzed Formylation of Amines and Nitroarenes to N‐formamides with CO2 and Dimethylamine Borane: The Influence of CO2 on the Formation of Azoxyarenes. Pd/PVP 与 CO2 和二甲胺硼烷催化胺和硝基烯烃甲酰化为 N-甲酰胺：二氧化碳对形成氮氧茚的影响。

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-30 DOI: 10.1002/cctc.202401260

Anna Skarżyńska, Wojciech Gil, Anna Trzeciak

引用次数: 0

Thiazolo[5,4‐d]Thiazole‐Linked Conjugated Porous Organic Polymers for Visible Light‐Driven C‐N Bond Formation Reactions 用于可见光驱动的 C-N 键形成反应的噻唑并[5,4-d]噻唑连接共轭多孔有机聚合物

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-29 DOI: 10.1002/cctc.202401327

Yuan-Yuan He, Zhang-Peng Ma, Chun-Hua Liu, Yuan-Yuan Zhu

{"title":"Thiazolo[5,4‐d]Thiazole‐Linked Conjugated Porous Organic Polymers for Visible Light‐Driven C‐N Bond Formation Reactions","authors":"Yuan-Yuan He, Zhang-Peng Ma, Chun-Hua Liu, Yuan-Yuan Zhu","doi":"10.1002/cctc.202401327","DOIUrl":"https://doi.org/10.1002/cctc.202401327","url":null,"abstract":"Due to their unique semiconducting properties, conjugated porous organic polymers (CPOPs) have garnered significant interest in various photocatalysis applications. In this study, we synthesize three thiazolo[5,4‐d]thiazole (TzTz)‐linked CPOPs with three polyaryl rigid cores of benzene (CPOP1), pyrene (CPOP2), and triazine (CPOP3). We investigated their efficacy in catalyzing visible light‐driven C‐N bond formation reactions, including C‐N cross‐couplings between aryl bromides and amines and amination reactions from aryl bromides and sodium azides. Among the three, only CPOP2, combined with NiCl2 or Ni(dtbbpy)Cl2, effectively facilitated these transformations. Notably, CPOP2 exhibited photocatalytic activities approximately six times higher than its small molecular counterpart C1 in both reactions. The CPOP catalyst was easily recovered through centrifugal separation and reused for five catalytic cycles with minimal loss of activity. Theoretical calculations revealed that the deliberate structural design of polyaryl moieties could effectively tune the energy gap, which is crucial for the photocatalytic activity in organic reactions. This study, therefore, demonstrates a novel application of TzTz‐linked CPOPs for heterogeneous photocatalytic organic transformations.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"18 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208786","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

Laccase‐Copper Nanohybrids as Highly Active Catalysts for Bio‐degradation 作为生物降解高活性催化剂的拉克酶-铜纳米杂化物

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-29 DOI: 10.1002/cctc.202401116

Yida Qiao, Ruobing Xin, Jun Ge

{"title":"Laccase‐Copper Nanohybrids as Highly Active Catalysts for Bio‐degradation","authors":"Yida Qiao, Ruobing Xin, Jun Ge","doi":"10.1002/cctc.202401116","DOIUrl":"https://doi.org/10.1002/cctc.202401116","url":null,"abstract":"Phenolic contamination is one of the crucial concerns for the safety of drinking water. Enzymatic degradation is a green and efficient manner for phenolic compounds removal from water. However, enzymatic degradation of phenolic pollutants in water is limited as a result of the low activity, stability and reusability of the enzyme. Herein, we propose a novel strategy to degrade phenolic pollutants in water by using an enzyme‐metal hybrid catalyst constructed by in situ formation of ultrafine Cu nanoparticles on the cross‐linked Laccase aggregates. The designed Cu/Lac CLEAs showed excellent performance on phenolic pollutants removal due to the cooperative catalysis between Lac CLEA and Cu NPs and the enrichment of phenolic pollutants in hybrid catalyst. The degradation efficiency of 2,4,6‐trichlorophenol catalyzed by Cu/Lac CLEAs was improved by 33% compared to the Lac CLEAs, while Cu NPs barely catalyzed the degradation process of phenolic pollutants. The Cu/Lac CLEAs hybrid catalyst exhibit high catalytic activity at room temperature in a wide pH range of 5‐8, making the degradation of phenolic pollutants more practically operational. In other words, this study develops a novel hybrid catalyst for the efficient removal of pollutants from water.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"19 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208785","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

N‐doped Ti3C2Tx MXene‐regulated metal‐oxide facilitates the efficient electrocatalytic CO2 reduction to CO 掺杂 N 的 Ti3C2Tx MXene 调节金属氧化物有助于将二氧化碳高效地电催化还原为 CO

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-29 DOI: 10.1002/cctc.202401133

Zhao-Tie Liu, Hui-Hui Cao, Zhen-Hong He, Pan-Pan Guo, Yue Tian, Xin Wang, Kuan Wang, Weitao Wang, Huan Wang, Yang Yang

{"title":"N‐doped Ti3C2Tx MXene‐regulated metal‐oxide facilitates the efficient electrocatalytic CO2 reduction to CO","authors":"Zhao-Tie Liu, Hui-Hui Cao, Zhen-Hong He, Pan-Pan Guo, Yue Tian, Xin Wang, Kuan Wang, Weitao Wang, Huan Wang, Yang Yang","doi":"10.1002/cctc.202401133","DOIUrl":"https://doi.org/10.1002/cctc.202401133","url":null,"abstract":"CO2 electroreduction reaction (CO2ER) provides a promising pathway for scaling up the conversion of CO2 to CO using renewable electricity, thereby providing an alternative potential pathway to carbon neutrality. Typically, the reaction conducted in aqueous media is an ideal way on the standpoint of sustainability. However, the undesired hydrogen evolution reaction (HER) is feasible to occur on the catalyst surface together with CO2ER, thereby reducing the overall CO2‐to‐CO efficiency. In this work, we utilized the stacked structure of N‐doped Ti3C2Tx MXene material supported metal oxide (ZnO) to form a ZnO/N‐Ti3C2Tx catalyst in electrolytic CO2 reduction to CO. The catalyst exhibited an Faradaic efficiency (FCO) of 96.4% in the CO2ER at ‐0.967 V (vs. RHE) with a current density of 7.2 mA·cm‐2. ZnO acted as the active site for the CO2ER in ZnO/N‐Ti3C2Tx, while N‐doped Ti3C2Tx MXene was responsible for enhancing textural properties and electrical conductivity, which could promote the mass transfer of gas molecules and electron transfer to ZnO active sites, and further improving the activity. This work inspires the rational design of unique metal oxide/N‐Ti3C2Tx interfaces to regulate the high‐performance electrocatalytic selectivity of CO2 reduction.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"23 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142226557","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

On‐purpose production of light olefins through oxidative dehydrogenation: An overview of recent developments 通过氧化脱氢工艺生产轻烯烃：最新发展综述

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-29 DOI: 10.1002/cctc.202401187

Arpan Mukherjee, Chanchal Samanta, Ankur Bordoloi

{"title":"On‐purpose production of light olefins through oxidative dehydrogenation: An overview of recent developments","authors":"Arpan Mukherjee, Chanchal Samanta, Ankur Bordoloi","doi":"10.1002/cctc.202401187","DOIUrl":"https://doi.org/10.1002/cctc.202401187","url":null,"abstract":"Products made from light olefins play an important role in our daily lives. Traditional light olefins production based on stream crackers and fluid catalytic cracking suffer from high energy consumption and CO2 emissions. Thereby, the continually increasing demand of light olefins needs to be met through more environmentally sustainable procedures. On‐purpose production routes are a preferred choice among petrochemicals manufacturers, being energy efficient and having lower carbon footprint. Among them, oxidative dehydrogenation (ODH) of light olefins is a thermodynamically favourable exothermic process as compared to non‐oxidative routes. They can be operated at lower temperatures and has low coke deposition on catalyst, thereby resisting rapid catalyst deactivation. Herein, we have analysed various catalytic systems utilised in the oxidative dehydrogenation process. We have reviewed role of support, chemical composition of catalyst, presence of dopant, oxidation state of active metal, controlled surface modification by oxidative and reductive pretreatments, and reaction factors for each system. The performance of various catalytic systems for ODH of ethane, propane and butane in the presence of O2, CO2, N2O and special oxidants have been reviewed. A short critical overview on emerging on‐purpose routes for the production of renewable 1,3 butadiene has also been discussed.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"262 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208787","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

Recent progress on Cobalt‐based Heterogeneous Catalysts for Hydrogen Production from Ammonia Borane 钴基异相催化剂用于氨硼烷制氢的最新进展

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-28 DOI: 10.1002/cctc.202401271

Yilin Li, xiaohan Gao, Xuechuan Lv, Ying Duan, Dong Sui, Wanting Chang, Yanliang Yang

{"title":"Recent progress on Cobalt‐based Heterogeneous Catalysts for Hydrogen Production from Ammonia Borane","authors":"Yilin Li, xiaohan Gao, Xuechuan Lv, Ying Duan, Dong Sui, Wanting Chang, Yanliang Yang","doi":"10.1002/cctc.202401271","DOIUrl":"https://doi.org/10.1002/cctc.202401271","url":null,"abstract":"Ammonia borane (NH3BH3, AB) is a quintessential exemplar of chemical hydrogen storage materials and has been widely used in hydrogen evolution. Although expensive metal catalysts (such as Rh, Ru, Pt, Ag, etc.) exhibit high activity in the hydrolysis of ammonia borane, inexpensive metals are more economical. Cobalt (Co), in particular, is not only relatively inexpensive and readily available, but also possesses high activity and selectivity. Compared to other catalysts, cobalt‐based catalysts have better durability and can maintain catalytic activity for a longer period of time, making them favored by researchers. These catalysts demonstrate excellent stability, hydrogen evolution rate, and turn over frequency. This article summarized previous progress in low price metal cobalt‐based catalysts for hydrogen precipitation from ammonia borane, focusing on cobalt‐based catalysts supported on various supports, especially those supported on carbon materials, metal oxides, MOFs, and nickel foams. The characteristics of high‐performance catalytic systems are analyzed in detail. The development prospects of Co catalysts for hydrogen production from ammonia borane were also discussed.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"58 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208789","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

Operando Surface X‐ray Diffraction Studies of Epitaxial Co3O4 and CoOOH Thin Films during Oxygen Evolution: pH Dependence 氧演化过程中外延 Co3O4 和 CoOOH 薄膜的操作面 X 射线衍射研究：pH 值依赖性

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-28 DOI: 10.1002/cctc.202400988

Canrong Qiu, Fouad Maroun, Mathilde Bouvier, Ivan Pacheco, Philippe Allongue, Tim Wiegmann, Carl Hendric Scharf, Victor de Manuel-Gonzalez, Finn Reikowski, Jochim Stettner, Olaf M. Magnussen

{"title":"Operando Surface X‐ray Diffraction Studies of Epitaxial Co3O4 and CoOOH Thin Films during Oxygen Evolution: pH Dependence","authors":"Canrong Qiu, Fouad Maroun, Mathilde Bouvier, Ivan Pacheco, Philippe Allongue, Tim Wiegmann, Carl Hendric Scharf, Victor de Manuel-Gonzalez, Finn Reikowski, Jochim Stettner, Olaf M. Magnussen","doi":"10.1002/cctc.202400988","DOIUrl":"https://doi.org/10.1002/cctc.202400988","url":null,"abstract":"Transition metal oxides, especially cobalt oxides and hydroxides, are of great interest as precious metal free electrode materials for the oxygen evolution reaction (OER) in electrochemical and photoelectrochemical water splitting. Here, we present detailed studies of the potential‐ and pH‐dependent structure and structural stability of Co3O4 and CoOOH in neutral to alkaline electrolytes (pH 7 to 13), using operando surface X‐ray diffraction, atomic force microscopy, and electrochemical measurements. The experiments cover the pre‐OER and OER range and were performed on epitaxial Co3O4(111) and CoOOH(001) films electrodeposited on Au(111) single crystal electrodes. The CoOOH films were structurally perfectly stable under all experimental conditions, whereas Co3O4 films exhibit at all pH values reversible potential‐dependent structural transformations of a sub‐nanometer thick skin layer region at the oxide surface, as reported previously for pH 13 (F. Reikowski et al., ACS Catal. 2019, 9, 3811). The intrinsic OER activity at 1.65 V versus the reversible hydrogen electrode decreases strongly with decreasing pH, indicating a reaction order of 0.2 with respect to [OH‐]. While the Co3O4 spinel is stable at pH 13, intermittent exposure to electrolytes with pH≤10 results in dissolution as well as gradual degradation of its OER activity in subsequent measurements at pH 13.","PeriodicalId":141,"journal":{"name":"ChemCatChem","volume":"7 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142208792","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

Photoinduced Copper‐Catalyzed Three‐Component Radical Carboamination of Styrene Derivatives 光诱导铜催化苯乙烯衍生物的三组分自由基羧化反应

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-28 DOI: 10.1002/cctc.202401234

Xiao-Die Huan, Juan Zhang, Wen-Jing Xiao, Jia-Rong Chen

引用次数: 0

Catalytic Synthesis of Fluoroalkyl Ketones 氟烷基酮的催化合成

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-27 DOI: 10.1002/cctc.202401249

Shun-Xi Li, Hai-Wu Du, Yu-Long Li, Wei Shu

引用次数: 0

Understanding the Environmental Sensitivity of Copper‐Metal Oxides Interactions in Cu/ZnO and Cu/Al2O3 Catalysts 了解 Cu/ZnO 和 Cu/Al2O3 催化剂中铜与金属氧化物相互作用对环境的敏感性

IF 4.5 3区化学

ChemCatChem Pub Date : 2024-08-27 DOI: 10.1002/cctc.202401323

Zhaocong Jiang, Didi Li, Haoyuan Gu, Shiqing Jin, Minghui Zhu

引用次数: 0