Self-gating enhanced carrier transfer in semiconductor electrocatalyst verified in microdevice  

作　　者：Haiyan Xiang Yueshao Zheng Yang Chen Yanting Xu Travis Shihao Hu Yexin Feng Yu Zhou Song Liu Xuli Chen 

机构地区：[1]State Key Laboratory of Chemo/Biosensing and Chemometrics,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China [2]Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices,School of Physics and Electronics,Hunan University,Changsha 410082,China [3]Department of Mechanical Engineering,California State University,Los Angeles,CA 90032,United States [4]School of Physics and Electronics,Central South University,Changsha 410082,China [5]College of Materials Science and Engineering,Hunan University,Changsha 410082,China

出　　处：《Chinese Chemical Letters》2022年第6期3221-3226,共6页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China(No.22175060,21975067);the National Basic Research Programs of China(No.2016YFA0300901);the National Science Foundation of China(No.11974105);the support from the U.S.National Science Foundation CREST Program(NSF No.HRD-1547723);the National Natural Science Foundation of China(No.51902346);Natural Science Foundation of China(No.21805077);the Natural Science Foundation of Hunan Province(No.2019JJ50075)。

摘　　要：Semiconductor electrocatalysis with weak conductivity can accumulate extremely high carriers at semiconductor-electrolyte interface by self-gating effect,which strongly promotes electrocatalytic efficiency.The correlation between semiconductor carrier mobility and electrocatalysis performance is still unclear.Herein atomic-thin transition metal dichalcogenides based composites have been developed for hydrogen evolution reaction(HER)performed with on-chip microdevices.Electrical and electrochemical measurement of individual flack verified the key role of high carrier mobility for enhanced HER activity.Carrier mobility regulation further demonstrated its high dependence with HER performance under self-gating.Our study provides new insight into the carrier mobility of the semiconductor in the electrocatalysis,paving the way for designing high-performance semiconductor catalysts.

关 键 词：Chemical vapor deposition Pt NPs@MoS_(2) Hydrogen evolution reaction Microelectrochemical SELF-GATING 

分 类 号：TQ426[化学工程]