CoSe_(2) nanobelt coupled with CoMoO_(4) nanosheet as efficient electrocatalysts for hydrogen and oxygen evolution reaction

作     者：Qiu-sheng Zhou Xin-wen Peng Lin-xin Zhong Run-cang Sun 

作者机构：State Key Laboratory of Pulp and Paper EngineeringSouth China University of TechnologyGuangzhou510641China Center for Lignocellulose Science and EngineeringLiaoning Key Laboratory Pulp and Paper EngineeringDalian Polytechnic UniversityDalian116034LiaoningChina 

出 版 物：《Environmental Science and Ecotechnology》 (环境科学与生态技术（英文）)

年 卷 期：2020年第1卷第1期

页      面：21-27页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 070304[理学-物理化学(含∶化学物理)] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(31971614,21736003) Guangdong Natural Science Funds for Distinguished Young Scholar(2016A030306027) Guangdong Natural Science Funds(2017A030313130) Guangzhou Science and Technology Funds(201904010078) State Key Laboratory of Pulp and Paper Engineering and Fundamental Research Funds for the Central Universities. 

主　　题：Hydrogen evolution Hybrid Synergetic Oxygen evolution Stability 

摘      要：Designing non-noble electrocatalysts with low-cost and efficient is crucial to the development of sustainable and clean energy resources.Here,we synthesized a novel S-CoSe_(2)/CoMoO_(4) and O-CoSe_(2)/CoMoO_(4) hybrid electrocatalysts for the HER and OER,respectively.Possibly due to the synergetic chemical coupling effects between CoSe_(2)/DETA and CoMoO_(4),and the introduction of S heteroatom and oxygen vacancy,this hybrid could expose enough active edges,and then promoted the constructed hybrid displayed superior hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)catalytic performance.The S-CoSe_(2)/CoMoO_(4) sample afforded a current density of 10 mAcm^(-2) at a small overpotential of 177 mV and a small Tafel slope of 54 mV dec^(-1).Moreover,the oxidized CoSe_(2)/CoMoO_(4)(O-CoSe_(2)/CoMoO_(4))also displayed a remarkable catalytic property for OER with a small Tafel slope of 43 mV dec^(-1),as well as excellent stability in 1.0 M KOH.Therefore,this noblemetal-free and highly efficient catalyst enables prospective applications for electrochemical applications.