Molybdenum Disulfide Nanosheets Decorated with Platinum Nanoparticle as a High Active Electrocatalyst in Hydrogen Evolution Reaction

Mina Razavi, M. Sookhakian, Boon Tong Goh, Hadariah Bahron, Eyas Mahmoud, Y. Alias

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Electrochemical hydrogen evolution reaction (HER) refers to the process of generating hydrogen by splitting water molecules with applied external voltage on the active catalysts. HER reaction in the acidic medium can be studied by different mechanisms such as Volmer reaction (adsorption), Heyrovsky reaction (electrochemical desorption) or Tafel reaction (recombination). In this paper, facile hydrothermal methods are utilized to synthesis a high-performance metal-inorganic composite electrocatalyst, consisting of platinum nanoparticles (Pt) and molybdenum disulfide nanosheets (MoS2) with different platinum loading. The as-synthesized composite is further used as an electrocatalyst for HER. The as-synthesized Pt/Mo-90-modified glassy carbon electrode shows the best electrocatalytic performance than pure MoS2 nanosheets. It exhibits Pt-like performance with the lowest Tafel slope of 41 mV dec−1 and superior electrocatalytic stability in an acidic medium. According to this, the HER mechanism is related to the Volmer-Heyrovsky mechanism, where hydrogen adsorption and desorption occur in the two-step process. According to electrochemical impedance spectroscopy analysis, the presence of Pt nanoparticles enhanced the HER performance of the MoS2 nanosheets because of the increased number of charge carriers transport.

Original languageEnglish
Article number9
JournalNanoscale Research Letters
Volume17
Issue number1
DOIs
Publication statusPublished - 2022

Keywords

  • Acidic medium
  • Electrocatalyst
  • Hydrogen evolution reaction
  • Molybdenum disulfide
  • Platinum nanoparticles

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics

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