Tuning the local electronic structure of oxygen vacancies over copper-doped zinc oxide for efficient CO_(2) electroreduction

作     者：Ke Wang Dongyu Liu Limin Liu Jia Liu XiaoFei Hu Ping Li Mingtao Li Andrey S.Vasenko Chunhui Xiao Shujiang Ding Ke Wang;Dongyu Liu;Limin Liu;Jia Liu;XiaoFei Hu;Ping Li;Mingtao Li;Andrey S.Vasenko;Chunhui Xiao;Shujiang Ding

作者机构：Xi'an Key Laboratory of Sustainable Energy Materials ChemistrySchool of ChemistryEnergy Storage Materials and Chemistry of Shaanxi University Engineering Research CenterXi'an Jiaotong University28 Xianning West RoadXi'an710049China International Research Center for Renewable Energy(IRCRE)State Key Laboratory of Multiphase Flow in Power Engineering(MFPE)Xi'an Jiaotong University28 Xianning West RoadXi'anShaanxi710049China HSE University101000MoscowRussia College of Materials and Environmental EngineeringHangzhou Dianzi UniversityHangzhou310018PR China CNNC Shaanxi Uranium Enrichment Co.Ltd.HanzhongChina 

出 版 物：《eScience》 (电化学与能源科学（英文）)

年 卷 期：2022年第2卷第5期

页      面：518-528页

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51773165,51973171) Natural Science Foundation of Shaanxi Province(2020JC-09) Key Laboratory Construction Program of Xi'an Municipal Bureau of Science and Technology(201805056ZD7CG40) 

主　　题：CO_(2)electroreduction Oxygen vacancy Heteroatom doping Metal oxide catalysts 

摘      要：Oxygen vacancies in metal oxides can serve as electron trap centers to capture CO_(2) and lower energy barriers for the electrochemical CO_(2) reduction reaction(CO_(2)RR).Under aqueous electrolytes,however,such charge-enriched active sites can be occupied by adsorbed hydrogen(H∗)and lose their effectiveness for the CO_(2)***,we develop an efficient catalyst consisting of Cu-doped,defect-rich ZnO(Cu–ZnO)for the CO_(2)RR,which exhibits enhanced CO Faradaic efficiency and current density compared to pristine *** introduced Cu dopants simultaneously stabilize neighboring oxygen vacancies and modulate their local electronic structure,achieving inhibition of hydrogen evolution and acceleration of the CO_(2)*** a flow cell test,a current density of more than 45​mA​cm^(−2) and a CO Faradaic efficiency of80%is obtained for a Cu–ZnO electrocatalyst in the wide potential range of−0.76​V to−1.06​V *** Hydrogen Electrode(RHE).This work opens up great opportunities for dopant-modulated metal oxide catalysts for the CO_(2)RR.