Asymmetrically coordinated single atom Cu catalyst with unsaturated C-Cu-N structure for CO_(2) reduction to CO  

作　　者：Zheng Liu Yuxuan Liu Jingqiao Zhang Ting Cao Zhiyi Sun Juzhe Liu Huishan Shang 

机构地区：[1]State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China [2]SEPA Key Laboratory of Eco-Industry,Chinese Research Academy of Environmental Sciences,Beijing 100012,China [3]The Key Laboratory of Resources and Environmental System Optimization,Ministry of Education,College of Environmental Science and Engineering,North China Electric Power University,Beijing 102206,China [4]School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Nano Research》2024年第5期3911-3918,共8页纳米研究（英文版）

基　　金：supported by the Open Research Fund of State Environmental Protection Key Laboratory of Eco-industry,Chinese Research Academy of Environmental Sciences(No.2022KFF-07);the National Natural Science Foundation of China(Nos.22201262,52302092,22375019);Natural Science Foundation of Henan Province(No.222300420290);Fundamental Research Funds for the Central Universities(No.2023MS057);Beijing Institute of Technology Research Fund Program for Young Scholars(No.2022CX01011).

摘　　要：Single atom catalysts(SACs)play a crucial role in energy catalysis due to their distinct coordination environment and high atomic utilization efficiency.This study focuses on the synthesis of a monatomic Cu catalyst with Cu-N1C1 coordination anchored to N-doped Ti_(3)C_(2)T_(x) MXene(Cu SA@N-Ti_(3)C_(2)T_(x))to achieve efficient reduction of CO_(2) to CO.Detailed characterization,including morphology and multispectral analysis,confirmed the uniform distribution of asymmetrically coordinated Cu atoms in unsaturated C-Cu-N bridge fragments on Ti_(3)C_(2)T_(x).The Cu SA@N-Ti_(3)C_(2)T_(x) catalyst exhibited an excellent CO selectivity with Faraday efficiency of 97.4%at-0.58 V vs.reversible hydrogen electrode(RHE)and satisfactory durability.The in situ X-ray absorption fine structure(XAFS)results confirmed that the carbon dioxide reduction reaction(CO_(2)RR)product distribution is mainly affected by potential-dependent valence change of Cu species.These findings highlight the extensive potential of tuning coordination structure of MXene-based single-atom catalysts for CO_(2) reduction reactions.

关 键 词：cooper single atom atomic regulation MXene Ti_(3)C_(2)T_(x) CO_(2)reduction 

分 类 号：O64[理学—物理化学]