低碳化学与化工2024，Vol.49Issue(10)：30-37,55,9.DOI:10.12434/j.issn.2097-2547.20240148
Ag/Ag2CO3宽电势催化剂电催化还原CO2制CO性能研究
Study on electrocatalytic performances of Ag/Ag2CO3 wide potential catalysts for CO2 reduction to CO
陈晨 1许春国2
作者信息
- 1. 中石油华东设计院有限公司,山东青岛 266071
- 2. 中国石油天然气第七建设有限公司,山东青岛 266061
- 折叠
摘要
Abstract
Electrocatalytic carbon dioxide reduction reaction(CO2RR)faces challenges of poor stability and low selectivity,and the development of high-performance CO2RR catalysts with a wide potential range has become a research hotspot.An in situ preparation method was adopted,where CO2RR catalyst I-Ag/Ag2CO3 was formed in situ on a silver foil substrate during linear sweep voltammetry in a KHCO3 electrolyte.I-Ag/Ag2CO3 was characterized by XRD,XPS,Raman,SEM and TEM.The electrocatalytic performance of I-Ag/Ag2CO3 was investigated in an H-type electrolytic cell.The results show that I-Ag/Ag2CO3 exhibits efficient catalytic performance for CO2 reduction to CO in a wide potential range(from-0.78 V to-1.78 V).The maximum CO partial current density of the catalyst is up to 53 mA/cm2,and the CO Faradaic efficiency(FECO)of the catalyst is higher than 80％in a wide potential range of 1 V,and the maximum FECO is 96％at-1.18 V(the reference electrode is a reversible hydrogen electrode,the same below)and can maintain no less than 90％within 20 h at-1.0 V.Through structure-performance relationship analysis,it is revealed that the special heterostructure formed between Ag and Ag2CO3 on I-Ag/Ag2CO3 obtained via the in situ preparation method.The special heterostructure reduces the resistance of electron transfer to CO2,and enhances the rate of the rate-determining step of CO2RR process.关键词
Ag/Ag2CO3/电催化还原/CO2/CO/宽电势催化剂Key words
Ag/Ag2CO3/electroreduction/CO2/CO/wide potential catalysts分类
化学化工引用本文复制引用
陈晨,许春国..Ag/Ag2CO3宽电势催化剂电催化还原CO2制CO性能研究[J].低碳化学与化工,2024,49(10):30-37,55,9.
