Fe-doped and sulfur-enriched Ni3S2 nanowires with enhanced reaction kinetics for boosting water oxidation

作     者：Liyue Zhang Qiucheng Xu Rukai Zhao Yanjie Hu Hao Jiang Chunzhong Li Liyue Zhang;Qiucheng Xu;Rukai Zhao;Yanjie Hu;Hao Jiang;Chunzhong Li

作者机构：Key Laboratory for Ultrafine Materials of Ministry of EducationFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Chemical EngineeringEast China University of Science and TechnologyShanghai200237China Section for Surface Physics and Catalysis(SurfCat)Department of PhysicsTechnical University of Denmark2800Kgs.LyngbyDenmark 

出 版 物：《Green Chemical Engineering》 (绿色化学工程（英文）)

年 卷 期：2022年第3卷第4期

页      面：367-373页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(21838003) the Innovation Program of Shanghai Municipal Education Commission,and the Fundamental Research Funds for the Central Universities(222201718002) 

主　　题：Ni3S2 Electrocatalyst Water splitting Oxygen evolution reaction 

摘      要：Exploring cost-effective and highly-active oxygen evolution reaction(OER)electrocatalysts is a pressing task to propel water electrolysis for green hydrogen ***,we constructed a class of Fe-doped and Senriched Ni_(3)S_(2)nanowires electrocatalysts for optimizing the target intermediates adsorption to decrease the OER overpotentials at various current *** optimal Ni_(3)S_(2)-1.4%Fe electrocatalyst possesses the most active sites and exhibits an ultralow overpotential of 190 mV at 10 mA cm^(-2) with an excellent stability of60 h,exceeding the majority of recently-reported Ni_(3)S_(2)-based *** trivalence Fe-doping not only reduces the electron density of the Ni center,but also enables the sulfur enrichment on the Ni_(3)S_(2) surface,which greatly improves the intrinsic activity and the number of target intermediates(*OOH).A novel methanol-assisted electrochemical evaluation further reveals that the Ni_(3)S_(2)-1.4%Fe electrocatalyst demonstrates a weaker binding ability to*OH with the rapid generation of*OOH species,and thus gives a lower apparent activation energy compared with the surface sulfur reduced *** work provides a new perspective for regulating the adsorption of intermediates through doping strategy.