气候变化领域集成服务门户(CCPortal): Engineering stepped edge surface structures of MoS2 sheet stacks to accelerate the hydrogen evolution reaction

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DOI	10.1039/c6ee03629e
	Engineering stepped edge surface structures of MoS2 sheet stacks to accelerate the hydrogen evolution reaction
	Hu J.; Huang B.; Zhang C.; Wang Z.; An Y.; Zhou D.; Lin H.; Leung M.K.H.; Yang S.
发表日期	2017
ISSN	17545692
起始页码	593
结束页码	603
卷号	10 期号:2
英文摘要	Two-dimensional molybdenum sulfide is an attractive noble-metal-free electrocatalyst for the hydrogen evolution reaction (HER). Significant efforts have been made to increase the number of exposed edge sites. However, little attention has been paid to devising edge surface structures of MoS2 sheet stacks to promote the HER kinetics. Herein we report the first demonstration of significantly enhanced HER kinetics by controllably fabricating a stepped MoS2 surface structure. Vertical arrays of MoS2 sheets terminated with such a stepped surface structure have proved to be an outstanding HER electrocatalyst with an overpotential of 104 mV at 10 mA cm-2, an exchange current density of 0.2 mA cm-2 and high stability. Experimental and theoretical results indicate that the enhanced electrocatalytic activity of the vertical MoS2 arrays is associated with the unique vertically terminated, highly exposed, stepped surface structure with a nearly thermoneutral H-adsorption energy. This work opens a new avenue to designing and developing layered materials for electrochemical energy applications. © The Royal Society of Chemistry 2017.
英文关键词	Electrocatalysts; Molybdenum compounds; Precious metals; Electrocatalytic activity; Electrochemical energy; Exchange current densities; Hydrogen evolution reactions; Layered material; Metal-free electrocatalysts; Molybdenum sulfide; Vertical arrays; Surface structure; acceleration; array; catalysis; catalyst; electric field; experimental study; hydrogen; kinetics; molybdenum; sulfide
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190524
作者单位	Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong; Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Hum, Kowloon, Hong Kong; Ability R and D Energy Research Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong, Hong Kong; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui, China
推荐引用方式 GB/T 7714	Hu J.,Huang B.,Zhang C.,et al. Engineering stepped edge surface structures of MoS2 sheet stacks to accelerate the hydrogen evolution reaction[J],2017,10(2).
APA	Hu J..,Huang B..,Zhang C..,Wang Z..,An Y..,...&Yang S..(2017).Engineering stepped edge surface structures of MoS2 sheet stacks to accelerate the hydrogen evolution reaction.Energy & Environmental Science,10(2).
MLA	Hu J.,et al."Engineering stepped edge surface structures of MoS2 sheet stacks to accelerate the hydrogen evolution reaction".Energy & Environmental Science 10.2(2017).