Kinetic Study of Hydrogen Evolution Reaction over Strained MoS2 with Sulphur-Vacancies using Scanning Electrochemical Microscopy
By Hong Li and Minshu Du and Michal J Mleczko and Ai Leen Koh and Yoshio Nishi and Eric Pop and Allen J Bard and Xiaolin Zheng
Published in Journal of the American Chemical Society
NULL
2016
Abstract
Molybdenum disulphide (MoS2), with its active edge-sites, is a proposed alternative to platinum for catalyzing hydrogen evolution reaction (HER). Recently, the inert basal plane of MoS2 was successfully activated and optimized with excellent intrinsic HER activity by creating and further straining sulphur (S)-vacancies. Nevertheless, little is known about the HER kinetics of those S-vacancies and the additional effects from elastic tensile strain. Herein, scanning electrochemical microscopy was used to determine the HER kinetic data for both unstrained S-vacancies (formal potential E0v = -0.53 VAg/AgCl, electron-transfer coefficient ?v = 0.4, electron-transfer rate constant k0v = 2.3
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