Selenium vacancy-rich and heteroatom-doped CoSe/Mo_(2)CTx MXene prepared using ionic liquid dopants for pH-universal hydrogen evolution and flexible supercapacitors

作     者：Mingjie Yi Shunyou Hu Na Li Hao Wang Jiaheng Zhang Mingjie Yi;Shunyou Hu;Na Li;Hao Wang;Jiaheng Zhang

作者机构：State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyShenzhen 518055GuangdongChina Research Centre of Printed Flexible ElectronicsSchool of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055GuangdongChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第9期

页      面：453-464,I0013页

核心收录：

学科分类：080801[工学-电机与电器] 081704[工学-应用化学] 0808[工学-电气工程] 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：supported by the National Natural Science Foundation of China(21905069) the Shenzhen Science and Technology Innovation Committee(JCYJ20180507183907224 and KQTD20170809110344233) the Economic,Trade and Information Commission of Shenzhen Municipality through the Graphene Manufacture Innovation Center(201901161514) 

主　　题：Flexible supercapacitors,Heteroatom-doped CoSe Hydrogen evolution reaction Ionic liquids Selenium vacancy 

摘      要：Vacancy engineering is a useful methodology in the development of catalysts and electrode ***,we report the introduction of Se-vacancy pairs in heteroatom-doped(N,B,and F)CoSe/Mo_(2)CT_(x) MXene(NBF-CoSe/Mo_(2)CT_(x))to enhance the hydrogen evolution reaction(HER)and supercapacitor activities via an ionic liquid-mediated *** vacancy pairs and heteroatom doping enable the reallocation of local electron states and add active sites,improving the electrochemical activity of NBF-CoSe/Mo_(2)CT_(x) with high HER activities over a broad range of *** a current density of 10 mA cm^(-2),overvoltages of 70 and 81 mV are respectively produced in 0.5 M H_(2)SO_(4)and 1 M *** optimal structure also exhibits outstanding electrochemical performance in an asymmetric supercapacitor with an energy density of 34.2 Wh kg^(-1)at a power density of 15989.6Wkg^(-1).This study opens new avenues for the introduction of Se vacancies and heteroatom doping to improve the application performance.