Trimetallic oxyhydroxides as active sites for large-current-density alkaline oxygen evolution and overall water splitting

作     者：Lei Chen Yunpeng Wang Xin Zhao Yuchao Wang Qian Li Qichen Wang Yougen Tang Yongpeng Lei Lei Chen;Yunpeng Wang;Xin Zhao;Yuchao Wang;Qian Li;Qichen Wang;Yougen Tang;Yongpeng Lei

作者机构：State Key Laboratory of Powder MetallurgyHunan Key Laboratory of Two-Dimensional MaterialsCentral South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Chemical Power SourcesCollege of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Physics and ElectronicsHunan Key Laboratory for Super-micro structure and Ultrafast ProcessCentral South UniversityChangsha 410083China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第110卷第15期

页      面：128-135页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the financial support from the Hunan Provincial Science and Technology Plan Project(No.2020JJ4710) the Hunan Key Laboratory of Two-Dimensional Materials(No.2018TP1010) the postdoctoral research funding plan in Central South University(No.140050022) the support from National Natural Science Foundation of China(No.12004439)。 

主　　题：Oxygen evolution Active sites Surface reconstruction Large current density Overall water splitting 

摘      要：Earth-abundant electrocatalysts for large-current-density water splitting under alkaline condition are desirable.Oxygen evolution reaction,which is a bottleneck of the overall water splitting,faces the problems of complicated reconstruction and deficiency in rational design of active sites.Herein,we report a series of transition metal chalcogenides for alkaline OER.Among them,FeCoNi(S)displayed a low overpotential of 293 m V to deliver a current density of 500 m A cm^(-2),which is in the top level of non-precious metal based OER electrocatalysts.A combination of(ex)in situ characterizations and DFT calculation shows that Ni(Fe,Co)trimetallic oxyhydroxides were the active sites for highly-efficient OER.Furthermore,for FeCoNi(S),when used as a bifunctional catalyst for water splitting,it only required a cell voltage of 1.84 V to deliver~500 m A cm^(-2) with extraordinary long-term stability over 2000 h.This work provides the comprehension of high-efficiency,robust catalysts for OER and overall water splitting at large current densities in alkaline media.