Controllable selenium vacancy engineering in basal planes of mechanically exfoliated WSe2 monolayer nanosheets for efficient electrocatalytic hydrogen evolution

Ying Sun; Xuewei Zhang; Baoguang Mao; Minhua Cao

doi:10.1039/c6cc07832j

Controllable selenium vacancy engineering in basal planes of mechanically exfoliated WSe₂ monolayer nanosheets for efficient electrocatalytic hydrogen evolution

Chem Commun (Camb). 2016 Dec 6;52(99):14266-14269. doi: 10.1039/c6cc07832j.

Authors

Ying Sun¹, Xuewei Zhang¹, Baoguang Mao¹, Minhua Cao¹

Affiliation

¹ Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China. caomh@bit.edu.cn.

PMID: 27878150
DOI: 10.1039/c6cc07832j

Abstract

Engineering intrinsic selenium vacancies (Se-vacancies) was achieved in mechanically exfoliated WSe₂ monolayer nanosheets (WSe₂ MLNSs) via an annealing treatment. Our theoretical and experimental results reveal that these Se-vacancies can efficiently activate and optimize the basal planes of the WSe₂ MLNSs. As expected, the optimized catalyst exhibits efficient electrocatalytic hydrogen evolution.