Stable core-shell Janus BiAg bimetallic catalyst for CO_(2) electrolysis into formate  

作　　者：Yaoyin Lou Xiaoyang Jerry Huang Kuang-Min Zhao Mark J.Douthwaite Tingting Fan Fa Lu Ouardia Akdim Na Tian Shigang Sun Graham J.Hutchings 

机构地区：[1]CAS Key Laboratory of Urban Pollutant Conversion,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China [2]Max Planck-Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT,Cardiff Catalysis Institute,School of Chemistry,Cardiff University,Cardiff CF103AT,United Kingdom [3]State Key Laboratory of Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [4]Center of Advanced Electrochemical Energy,Institute of Advanced Interdisciplinary Studies,Chongqing University,Chongqing 400044,China

出　　处：《Chinese Chemical Letters》2025年第3期415-421,共7页中国化学快报(英文版)

基　　金：the Max Planck Centre for Fundamental Heterogeneous Catalysis(FUNCAT)for financial support;The authors acknowledge funding from the National Natural Science Foundation of China(No.22002131);China Postdoctoral Science Foundation(No.2020M671963)。

摘　　要：CO_(2)electrolysis into formate is a promising technology with the potential to simultaneously alleviate energy shortages and global warming.However,the limited stability of the catalysts during long-term electrolysis hinders their widespread implementation.Herein,we show that a core-shell bimetallic BiAg catalyst with a multifaceted Janus structure at its core can achieve a stability of up to 300 h with a formate faradaic efficiency(FE_(formate))over 90%at−0.75 V vs.RHE(reversible hydrogen electrode)in an H-type cell.Our investigations reveal the important role of the Janus structure on the transfer of electrons,favoring their delocalization across the catalyst and enhancing their mobility.We propose that the compressive strain inclined to grain boundaries within this structure would lower the energy barrier for electrons transfer and promotes the cooperation between Ag and Bi.Indeed,Ag initiates the activation of CO_(2)through a series of cascade reactions and is subsequently hydrogenated on Bi.Additionally,our study suggests that Ag plays a crucial role in stabilizing the catalyst structure after long-term electrolysis.This work highlights a new strategy for tandem CO_(2)electrolysis,providing novel insights for the design of formate formation catalysts.

关 键 词：CO_(2) reduction Cascade catalysis FORMATE BiAg JANUS 

分 类 号：O643.36[理学—物理化学]