Microwave-induced surface amorphization of Cu_(2)(OH)_(2)CO_(3) catalyst promotes multi-carbon products selectivity of CO_(2) electroreduction  

作　　者：Jie Wang Min Wang Yang Wang Zixuan Wei Xin He Haojie Zang Xixiong Jin Lingxia Zhang 

机构地区：[1]State Key Lab of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Bejing 100049,China [3]School of Chemistry and Materials Science,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences Hangzhou 310024,China

出　　处：《Science China Chemistry》2025年第4期1597-1607,共11页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China(22208363,52204323);the Science and Technology Commission of Shanghai(20520711900,21YF1416300).

摘　　要：For CO_(2) electroreduction;efficient catalysts with superior selectivity toward multi-carbon(C_(2+))products(such as C_(2)H_(4);C_(2)H_(5)OH;etc.)are intensely desired.Amorphous Cu-based catalysts show appealing performance on the crucial C–C coupling;but their synthesis procedures are complicated and their actual mechanisms are still unclear.In this work;surface amorphization has been implemented on Cu_(2)(OH)_(2)CO_(3) catalysts by a very simple microwave-induction method;improving the Faradaic efficiency for C_(2+)products(FE_(C_(2+)))up to 86%(increased by~26%than that on Cu_(2)(OH)_(2)CO_(3))at a partial current density of 258 mA cm^(-2);and a high FEC_(2+)of 75%at 500 m A cm^(-2)in a flow cell.Moreover;the catalyst exhibits good stability.In situ investigations disclose that the amorphous surface optimizes the adsorption state(binding mode and coverage)of key intermediate*CO and stabilizes Cu^(+)pieces;facilitating the dimerization of*CO into*OCCO and hydrogenation to*OC_(2)H_(5);ultimately achieving high yields of C_(2+)products.This work highlights a simple microwave approach for surface amorphization and the roles of amorphous features in CO_(2) reduction to C_(2+)products;which could be valuable references for designing highperformance catalysts for CO_(2) electroreduction.

关 键 词：microwave treatment amorphous surface Cu-based catalysts electrocatalytic CO reduction multi-carbon products 

分 类 号：O643.36[理学—物理化学]