Elucidating the structure-activity relationship of Cu-Ag bimetallic catalysts for electrochemical CO_(2) reduction  

作　　者：Qining Huang Lili Wan Qingxuan Ren Jingshan Luo 

机构地区：[1]Institute of Photoelectronic Thin Film Devices and Technology,State Key Laboratory of Photovoltaic Materials and Cells,Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin,Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology,Nankai University,Tianjin 300350,China [2]Frontiers Science Center for New Organic Matter,Nankai University,Tianjin 300071,China [3]Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China

出　　处：《Journal of Energy Chemistry》2024年第6期345-351,I0009,共8页能源化学（英文版）

基　　金：the funding support from the National Key Research and Development Program of China(2019YFE0123400);the Tianjin Distinguished Young Scholars Fund(20JCJQJC00260);the Major Science and Technology Project of Anhui Province(202203f07020007);the Anhui Conch Group Co.,Ltd;the“111”Project(B16027);the funding support from the Natural Science Foundation of China(22209081);the fellowship of China Postdoctoral Science Foundation(2021M690082)。

摘　　要：Developing bimetallic catalysts is an effective strategy for enhancing the activity and selectivity of electrochemical CO_(2) reduction reactions,where understanding the structure-activity relationship is essential for catalyst design.Herein,we prepared two Cu-Ag bimetallic catalysts with Ag nanoparticles attached to the top or the bottom of Cu nanowires.When tested in a flow cell,the Cu-Ag catalyst with Ag nanoparticles on the bottom achieved a faradaic efficiency of 54%for ethylene production,much higher than the catalyst with Ag nanoparticles on the top.The catalysts were further studied in the H-cell and zero-gap MEA cell.It was found that placing the two metals in the intensified reaction zone is crucial to triggering the tandem reaction of bimetallic catalysts.Our work elucidates the structure-activity relationship of bimetallic catalysts for CO_(2) reduction and demonstrates the importance of considering both catalyst structures and cell characteristics to achieve high activity and selectivity.

关 键 词：Electrochemical CO_(2)reduction Bimetallic catalyst CU-AG Structure-activity relationship 

分 类 号：TQ426[化学工程] X701[环境科学与工程—环境工程]