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

Jue Hu, Chengxu Zhang, Yizhen Zhang, Baomin Yang, Qianglong Qi, Mingzi Sun, Futing Zi, Michael K.H. Leung, Bolong Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

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.

Original languageEnglish
Article number2002212
JournalSmall
Volume16
Issue number28
DOIs
Publication statusE-pub ahead of print - 8 Jun 2020

Keywords

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

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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