Vertical kinetically oriented MoS2-Mo2N heterostructures on carbon cloth : a highly efficient hydrogen evolution electrocatalyst

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)2201-2207
Number of pages7
Journal / PublicationSustainable Energy and Fuels
Volume4
Issue number5
Online published27 Feb 2020
Publication statusPublished - 1 May 2020

Abstract

Rationally designed nanostructures can synergistically provide more active sites to optimize the electrocatalytic properties and decrease the energy barrier of the hydrogen evolution reaction (HER). Although MoSis a promising two dimensional (2D) electrocatalyst, the curved nanoplates adversely affect the delivery of Hduring the HER. Herein, kinetically oriented MoSnanoflakes are prepared vertically on Mo2N nanoneedles anchored on flexible carbon cloth (MoS2-Mo2N/CC). The three-dimensional (3D) skeleton composed of carbon cloth (CC) and Mo2N prevents collapse of MoSduring fabrication and electrochemical reactions. Moreover, the strong electronic interactions between MoSand Mo2N enhance charge transfer, moderate the hydrogen binding energy, and decrease the reaction energy thermodynamically. MoS2-Mo2N/CC delivers moderate hydrogen binding energy and fast H2desorption further enhancing the HER activity. Owing to the optimized hybrid structure, MoS2-Mo2N/CC exhibits a small overpotential of 121 mV at 10 mA cm-2, small Tafel slope of 49.6 mV dec-1, and outstanding stability of 97.4% at 50 mA cm-2. The results reveal the large potential of vertically oriented HER catalysts in energy storage and conversion.

Citation Format(s)

Vertical kinetically oriented MoS2-Mo2N heterostructures on carbon cloth : a highly efficient hydrogen evolution electrocatalyst. / Huang, Chao; Ruan, Qingdong; Song, Hao; Luo, Yang; Bai, Hongzhen; Gao, Biao; Chu, Paul K.

In: Sustainable Energy and Fuels, Vol. 4, No. 5, 01.05.2020, p. 2201-2207.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review