Plasma-Induced Fabrication and Straining of MoS2 Films for the Hydrogen Evolution Reaction

Tianqi Liu, Xinyu Liu, Souvik Bhattacharya, Zhipeng Ye, Rui He, Xuan P.A. Gao, Rohan Akolkar, R. Mohan Sankaran

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We present a novel plasma conversion process to fabricate strained MoS2 films for the hydrogen evolution reaction (HER). Materials characterization of the initially converted film shows a rippled surface morphology that consequently contains in-plane and out-of-plane tensile strain. Smoothening of the films and relaxation of the strain are demonstrated by postsynthesis thermal treatment. Only negligible sulfur vacancies are detected in both the initially converted and thermally treated films. Electrochemical characterization shows that our plasma-converted, strained MoS2 films are as intrinsically HER active as those produced by generating sulfur vacancies via postsynthesis plasma treatment. The reduced number of processing steps and direct, transfer-free growth enable a simple and scalable approach for fabricating MoS2-based catalysts.

Original languageEnglish
Pages (from-to)5162-5170
Number of pages9
JournalACS Applied Energy Materials
Volume2
Issue number7
DOIs
StatePublished - Jul 22 2019

Keywords

  • hydrogen evolution reaction (HER)
  • molybdenum disulfide (MoS)
  • plasma
  • strain

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