Modulating the degree of O vacancy defects to achieve selective control of electrochemical CO_(2) reduction products

作     者：Tianbo Jia Lili Wang Zhouhao Zhu Baikang Zhu Yingtang Zhou Guoxing Zhu Mingshan Zhu Hengcong Tao Tianbo Jia;Lili Wang;Zhouhao Zhu;Baikang Zhu;Yingtang Zhou;Guoxing Zhu;Mingshan Zhu;Hengcong Tao

作者机构：School of Petrochemical Engineering&EnvironmentZhejiang Ocean UniversityZhoushan 316022China Department of General PracticeFirst Medical CenterChinese PLA General HospitalBeijing 100853China National&Local Joint Engineering Research Center of Harbor Oil&Gas Storage and Transportation TechnologyZhoushan 316022China School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China Guangdong Key Laboratory of Environmental Pollution and HealthSchool of EnvironmentJinan UniversityGuangzhou 511443China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第5期

页      面：482-486页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：funded by the National Natural Science Foundation of Zhejiang Province(Nos.LQ21B030007 and LTGS23B030002) “Leading Goose”R&D Program of Zhejiang(No.2023C01191) the National Natural Science Foundation of China(No.22005269) Science and Technological program of Ningbo(No.2021S136) The Open Research Subject of Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control(No.2022Z02) 

主　　题：CO_(2) O-vacancies Bimetallic catalysts Copper oxide Cadmium oxide Selective 

摘      要：Conversion of CO_(2) into high-value products using electrochemical CO_(2) reduction(ECR)technology is an effective way to alleviate global warming and reach carbon *** oxygen vacancies in heterogenous catalysis are generally considered as a powerful method to enhance the performance of ECR by promoting CO_(2) adsorption and ***,the extent of defects in oxygen vacancies-activity relation has rarely been ***,we prepared Cu-Cd bimetallic catalysts with adjustable oxygen defect degree by controlling the amount of cadmium *** transform infrared spectroscopy characterization results reveal that the formation of oxygen vacancies is attributed to the asymmetric stretching of Cu-O by the addition of *** results show that the oxygen defect degree can modulate the selectivity of ECR products.A low degree of oxygen defects(CuO)is generally associated with lower product Faraday efficiency(FE_(C2)/FE_(C1)≈114%),but overabundant oxygen vacancies(CuO_(2.625)-CdO_(0.375))are not entirely favorable to improving ECR activity(FE_(C2)/FE_(C1)≈125%)and single selectivity,while an appropriate degree of oxygen vacancies(CuO_(2.75)-CdO_(0.25))can facilitate the ECR process toward single product selective production(FE_(C2)/FE_(C1)≈296%).The theoretical calculation showed that the O vacancy formed on CuO and the interface between CdO and CuO were conducive to enhancing the formation of ^(*)COOH intermediate and promoting the generation of ethylene *** study provides a new approach and insight into the selective production of single products for future industrial applications of ECR.