Pause electrolysis for acidic CO_(2) reduction on 3-dimensional Cu  

作　　者：Zhanyou Xu Yi Xie Ying Wang 

机构地区：[1]Department of Chemistry,The Chinese University of Hong Kong,Hong Kong S.A.R.,China

出　　处：《Materials Reports(Energy)》2023年第1期93-99,I0003,共8页材料导报（能源）（英文）

基　　金：the financial support from the Research Grants Council of the Hong Kong Special Administrative Region(project no.24304920).

摘　　要：Electrochemical CO_(2) reduction reaction(CO_(2) RR)exhibits remarkable potential in producing valuable chemicals with renewable energy.Operating CO_(2) RR in acidic media is beneficial to solve the issue of low carbon utilization brought by(bi)carbonate formation at the cathode.Suppressing the competing hydrogen evolution reaction and achieving stable CO_(2) RR performance remains challenging.Herein,we constructed a 3-dimensional Cu(3D-Cu)gas diffusion electrode(GDE)to achieve efficient C_(2)H_(4) production with a partial current density(j C_(2)H_(4))of over 470 mA cm^(2) and a Faradaic efficiency(FE C_(2)H_(4)) of 40%.With pause electrolysis,the decay rate of the j C_(2)H_(4) is only half that of the traditional constant electrolysis.The GDE after constant electrolysis was found to suffer from severe salt formation,leading to the decreased activity and poor stability.

关 键 词：CO_(2) reduction reaction(CO_(2)RR) 3D-Cu electrode Acidic media Pause electrolysis 

分 类 号：O643[理学—物理化学]