Molybdenum Disulfide Modified by Laser Irradiation for Catalyzing Hydrogen Evolution

Chao Meng, Meng Chang Lin, Xi Wen Du, Yue Zhou

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

As a low-cost and promising electrocatalyst for hydrogen evolution reaction (HER), molybdenum disulfide (MoS 2 ) possesses both an inert basal plane and catalytically active edges. As a result, considerable efforts have been made to activate the MoS 2 basal plane for improving the HER activity. Herein, we first employed laser ablation in liquid to create plentiful sulfur (S)-vacancies in the basal plane of 2H-MoS 2 nanosheets under ambient conditions. The experimental measurements and theoretical calculations prove that S vacancies in the basal plane can serve as the additional active sites and optimize the free energy change for hydrogen adsorption (ΔG H∗ ) at the same time. As a result, in comparison with pristine MoS 2 (P-MoS 2 ), laser treated MoS 2 (L-MoS 2 ) realizes a significant improvement in the HER activity. Our work represents a facile method to enhance the catalytic performance of 2H-MoS 2 nanosheets and may help to guide the synthesis of other efficient two-dimensional metal chalcogenide catalysts.

Original languageEnglish
Pages (from-to)6999-7003
Number of pages5
JournalACS Sustainable Chemistry and Engineering
Volume7
Issue number7
DOIs
Publication statusPublished - Apr 2019
Externally publishedYes

Keywords

  • Hydrogen evolution reaction
  • Laser ablation
  • Molybdenum disulfide
  • Nanosheet
  • Sulfur vacancies

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

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