Yolk-shell Bi_(2)O_(3)/Bi_(2)O_(2)CO_(3) heterojunction for enhanced CO_(2) electroreduction into formate  

作　　者：Jianzhong Xu Yunxiang Ma Yanli Zhao 

机构地区：[1]School of Chemistry,Chemical Engineering and Biotechnology,Nanyang Technological University,Singapore 637459,Singapore

出　　处：《Science China Chemistry》2025年第3期874-880,共7页中国科学(化学英文版)

基　　金：supported by the Ministry of Education of Singapore under its Academic Research Funds (RG85/22 and RG2/22);the Agency for Science;Technology and Research (A*STAR)of Singapore through its Manufacturing,Trade and Connectivity (MTC)Individual Research Grant (M21K2c0105)。

摘　　要：The integration of nanostructures with compositional optimization is crucial for enhancing their catalytic performance.Herein,a yolk-shell structured catalyst incorporating a Bi_(2)O_(3)/Bi_(2)O_(2)CO_(3) heterojunction is developed for CO_(2) electroreduction.This design combines precise nano-structuring with optimized compositional control,expanding the specific surface area,exposing more highly active catalytic sites,accelerating charge transport and improving mass transfer.As a result,the catalyst exhibits superior catalytic performance with 92.3%formate selectivity and a partial current density of-43.3 mA cm^(-2)at-1.0 V vs.RHE.The precisely engineered nanostructures and heterojunction composition exhibit a good stability during the catalysis with negligible degradation in the catalytic process.

关 键 词：active sites CO_(2)reduction electrocatalysis HETEROJUNCTION yolk-shell structure 

分 类 号：X701[环境科学与工程—环境工程] TQ426[化学工程]