Single MoTe_(2) sheet electrocatalytic microdevice for in situ revealing the activated basal plane sites by vacancies engineering

作     者：Huan Yang Yinghe Zhao Qunlei Wen Yan Mi Youwen Liu Huiqiao Li Tianyou Zhai Huan Yang;Yinghe Zhao;Qunlei Wen;Yan Mi;Youwen Liu;Huiqiao Li;Tianyou Zhai

作者机构：State Key Laboratory of Materials Processing and Die&Mould Technologyand School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Guangxi Key Laboratory of Chemistry and Engineering of Forest Productsand School of Chemistry and Chemical EngineeringGuangxi University for NationalitiesNanning530008China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2021年第14卷第12期

页      面：4814-4821页

核心收录：

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：This work was financially supported by the National Natural Science Foundation of China(Nos.21805102,22071069,and 21825103) the Hubei Provincial Natural Science Foundation of China(No.2019CFA002) the Foundation of Basic and Applied Basic Research of Guangdong Province(No.2019B1515120087) 

主　　题：MoTe_(2) electrocatalytic microdevice hydrogen evolution reaction vacancies engineering electron structure 

摘      要：Activating basal plane inert sites will endow MoTe_(2) with prominent hydrogen evolution reaction(HER)catalytic capability and arouse a new family of HER ***,we fabricated single MoTe_(2) sheet electrocatalytic microdevice for in situ revealing the activated basal plane sites by vacancies *** the extraction of electrical parameters of single MoTe_(2) sheet,the in-plane and interlayer conductivities were optimized effectively by Te vacancies due to the defect *** deeply,Te vacancies can induce the delocalization of electrons around Mo atoms and shift the d-band center,as a consequence,facilitate the adsorption of H from the catalyst surface for HER *** by the coordinated regulation of band structure and local charge density,the overpotential at−10 mA·cm^(−2)was reduced to 0.32 V after Te vacancies compared to 0.41 V for the basal plane sites of same MoTe_(2) ***,the insights gained from single nanosheet electrocatalytic microdevice can be applied to the improved HER of the commercial MoTe_(2) *** the in situ testing of the atomic structure-electrical behavior-electrochemical properties of a single nanosheet before/after vacancies introducing provides reliable insight to structure-activity relationships.