Microscopic insights into the catalytic mechanisms of monolayer MoS2 and its heterostructures in hydrogen evolution reaction  

作　　者：Min Hong Jianping Shi Yahuan Huan Qin Xie Yanfeng Zhang 

机构地区：[1]Department of Materials Science and Engineering,College of Engineering,Peking University,Beijing 100871,China [2]Center for Nanochemistry (CNC),Beijing Science and Engineering Center for Nanocarbons,Beijing National Laboratory for Molecular Sciences,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China

出　　处：《Nano Research》2019年第9期2140-2149,共10页纳米研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.51861135201,5147200i,21473001,51290272,and 61774003);the Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics(No.KF201601).

摘　　要：Exploring high-efficient catalysts for hydrogen evolution reaction(HER)has become very urgeht for resolving the energy related issues.Recently,two-dimensional layered MoS2 and its heterostructures with graphene or other traditional photocatalysts have presented great potentials for electrocatalytic and photocatalytic HER applications.On-site investigations of the atomic-scale structures and local electronic properties of the catalytically active sites are the key points for understanding the internal mechanisms,which however are hard to be achievec from the practical systems.Hereby,this review focuses on the recent progresses on the on-site scanning tunneling microscopy/spectroscopy investigations of the atomic structures and electronic properties of the ultrahigh-vacuum deposited and chemical vapor deposition(CVD)synthesized monolayer MoS2 and MoSz/graphene vertical stacks on the electrodes of Au(111)and Au foils.The correlations between the respective HER activities,edge types and edge electronic states are comparatively introduced.Secondly,this review also introduces thephotocatalytic HER applications of CVD-grown MoS2/WS2 and WS/MoS2 vertical stacks on Au foils,mainly considering of their type-ll band.alignments and the novel interlayer charge transfer behaviors.Finally,future research directions are also proposed for in-depth understanding of the catalytic mechanism,as well as for exploring more efficient HER catalysts.

关 键 词：M0S2 seanning TUNNELING microscopy/spectroscopy hydrogen evolution reaction metallic edge states vertical STACKS 

分 类 号：O4[理学—物理]