Interface Modulation of MoS2/Metal Oxide Heterostructures for Efficient Hydrogen Evolution Electrocatalysis

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

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Author(s)

  • Jue Hu
  • Chengxu Zhang
  • Baomin Yang
  • Qianglong Qi
  • Mingzi Sun
  • Futing Zi
  • Bolong Huang

Detail(s)

Original languageEnglish
Article number2002212
Journal / PublicationSmall
Volume16
Issue number28
Online published8 Jun 2020
Publication statusPublished - 16 Jul 2020

Abstract

Developing efficient earth-abundant MoS2 based hydrogen evolution reaction (HER) electrocatalysts is important but challenging due to the sluggish kinetics in alkaline media. Herein, a strategy to fabricate a high-performance MoS2 based HER electrocatalyst by modulating interface electronic structure via metal oxides is developed. All the heterostructure catalysts present significant improvement of HER electrocatalytic activities, demonstrating a positive role of metal oxides decoration in promoting the rate-limited water dissociation step for the HER mechanism in alkaline media. The as-obtained MoS2/Ni2O3H catalyst exhibits a low overpotential of 84 mV at 10 mA cm−2 and small charge-transfer resistance of 1.5 Ω in 1 m KOH solution. The current density (217 mA cm−2) at the overpotential of 200 mV is about 2 and 24 times higher than that of commercial Pt/C and bare MoS2, respectively. Additionally, these MoS2/metal oxides heterostructure catalysts show outstanding long-term stability under a harsh chronopotentiometry test. Theoretical calculations reveal the varied sensitivity of 3d-band in different transition oxides, in which Ni-3d of Ni2O3H is evidently activated to achieve fast electron transfer for HER as the electron-depletion center. Both electronic properties and energetic reaction trends confirm the high electroactivity of MoS2/Ni2O3H in the adsorption and dissociation of H2O for highly efficient HER in alkaline media.

Research Area(s)

  • alkaline environment, hydrogen evolution reaction, interface modulation, MoS2/metal oxides heterostructures, reaction kinetics

Citation Format(s)

Interface Modulation of MoS2/Metal Oxide Heterostructures for Efficient Hydrogen Evolution Electrocatalysis. / Hu, Jue; Zhang, Chengxu; Zhang, Yizhen; Yang, Baomin; Qi, Qianglong; Sun, Mingzi; Zi, Futing; Leung, Michael K. H.; Huang, Bolong.

In: Small, Vol. 16, No. 28, 2002212, 16.07.2020.

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