Rational design of stable sulfur vacancies in molybdenum disulfide for hydrogen evolution

doi:10.1016/j.jcat.2019.12.028

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	Rational design of stable sulfur vacancies in molybdenum disulfide for hydrogen evolution
	Zhao, Yunxing ; Tang, Michael T.; Wu, Sudong ; Geng, Jing ; Han, Zhaojun ; Chan, Karen ; Gao, Pingqi ; Li, Hong
刊名	JOURNAL OF CATALYSIS
	2020
卷号	382 页码:320-328
关键词	MOS2 MONOLAYER ACTIVE-SITES S VACANCIES BASAL-PLANE EFFICIENT CATALYST GRAPHENE SULFIDE HYDRODEOXYGENATION ELECTROCATALYSTS
DOI	10.1016/j.jcat.2019.12.028
英文摘要	Sulfur (S) vacancies in MoS2 have been found to act as a new active center, which shows an unprecedented intrinsic HER activity under elastic strain. However, such S-vacancies are unstable and the activities are very sensitive to the vacancy concentration. A strategy to stabilize these abundant active sites is thus highly desirable. Herein, we rationally design a catalyst system to stabilize S-vacancies in the basal plane of 2H-MoS2 supported on defective vertical graphene network (VGN). The energetically favorable line-shaped S-vacancies in MoS2 show a consistently high HER activity that is insensitive to S-vacancy concentration. Moreover, the defective graphene support effectively stabilizes these S-vacancies. The optimized catalyst exhibits a superior HER activity with overpotential of 128 mV at 10 mA cm(-2) and Tafel slope of 50 mV dec(-1). Most importantly, the catalyst shows greatly increased stability over 500 h; benchmarking the most stable nonprecious HER catalyst in acidic media to date. (C) 2019 Elsevier Inc. All rights reserved.
学科主题	Chemistry ; Engineering
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20046]
专题	2020专题
作者单位	1.Gao, PQ 2.Chan, K 3.Li, H (corresponding author), Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore.
推荐引用方式 GB/T 7714	Zhao, Yunxing,Tang, Michael T.,Wu, Sudong,et al. Rational design of stable sulfur vacancies in molybdenum disulfide for hydrogen evolution[J]. JOURNAL OF CATALYSIS,2020,382:320-328.
APA	Zhao, Yunxing.,Tang, Michael T..,Wu, Sudong.,Geng, Jing.,Han, Zhaojun.,...&Li, Hong.(2020).Rational design of stable sulfur vacancies in molybdenum disulfide for hydrogen evolution.JOURNAL OF CATALYSIS,382,320-328.
MLA	Zhao, Yunxing,et al."Rational design of stable sulfur vacancies in molybdenum disulfide for hydrogen evolution".JOURNAL OF CATALYSIS 382(2020):320-328.