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Controllable selenium vacancy engineering in basal planes of mechanically exfoliated WSe2 monolayer nanosheets for
Ying Sun1, Xuewei Zhang1, Baoguang Mao1
1Key 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.
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.
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