Enhancing the electrocatalytic water splitting efficiency for amorphous MoSx

Chang Lung Hsu, Yung Huang Chang, Tzu Yin Chen, Chien Chih Tseng, Kung-Hwa Wei, Lain Jong Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Amorphous molybdenum sulfide (MoSx) materials have been considered as cheap and promising catalysts for hydrogen evolution reaction (HER). In this contribution, we report that the amorphous MoSx catalysts prepared by the low temperature thermolysis of the (NH 4)2MoS4 precursors on carbon clothes (catalyst loading: 3.2 mg/cm2) exhibit a Tefal slope of 50.5 mV/dec and a high exchange current density of 1.5 × 10-3 mA/cm2 in 0.5 M H2SO4 solutions. Spectroscopic studies of the amorphous MoSx catalysts show that the increase of HER efficiency is positively correlated to the concentration of S22- species, providing strong evidence to support the argument that S 22- is an active species for electrocatalytic HER. Additionally, the method for preparing catalysts is simple, scalable and applicable for large-scale production.

Original languageEnglish
Pages (from-to)4788-4793
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number10
DOIs
StatePublished - 26 Mar 2014

Keywords

  • Electrocatalytic reaction
  • Hydrogen evolution reaction
  • Molybdenum disulfide
  • Niobium chloride

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