Investigation on Cu promotion effect on Ce-based solid solution-anchored Rh single atoms for three-way catalysis  

作　　者：Jianing He Xiao Wang Zijian Wang Ruize Jiang Ke Wang Rui Zhang Huilin Wang Baokang Geng Hongyi Gao Shuyan Song Hongjie Zhang 

机构地区：[1]State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China [2]School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China [3]China School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China [4]Department of Chemistry,Tsinghua University,Beijing 100084,China

出　　处：《Chinese Chemical Letters》2025年第2期546-550,共5页中国化学快报(英文版)

基　　金：supported by the financial aid from National Science and Technology Major Project of China(No.2020YFE0204500);National Natural Science Foundation of China(Nos.22020102003,22025506 and 11975301);Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2020286)。

摘　　要：The three-way catalyst(TWC),as a promising approach to control automobile exhaust emission,has been widely studied and applied.However,it still suffers from the high light-off temperature and poor stability.Herein,we synthesized a multicomponent catalyst Rh/Cu-CeSn by using Cu metal doping to modify the Ce-based solid solution,which exhibited good TWC catalytic performance:the light-off temperatures for CO,NO,and C_(3)H_(6)conversion are 172℃,266℃,and 193℃,respectively.Moreover,the catalyst still maintained good activity after 12 h of the continuous reaction under high-temperature conditions.The experiments and mechanism studies reveal that due to the redox pair Cu^(+)/Cu^(2+),the Cu incorporation can effectively inhibit the Rh transition to the oxidation state and greatly enhance the catalytic activity and stability.This work provides a viable strategy for precise characteristic modulation of composite oxide supports during the fabrication of noble metal-based catalysts,which significantly reduces environmental pollution from energy applications.

关 键 词：Three-way catalysts(TWC) Solid solution CO-PRECIPITATION Rhodium(Rh)catalyst Oxygen vacancies 

分 类 号：TQ426[化学工程] X734.2[环境科学与工程—环境工程]