Enhancing Hydrogen Evolution Reaction via Synergistic Interaction between the [Mo3S13]2- Cluster Co-Catalyst and WSePhotocathode

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

7 Scopus Citations
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Author(s)

  • Fanxing Xi
  • Farabi Bozheyev
  • Xiaoyu Han
  • Marin Rusu
  • Jörg Rappich
  • Peter Bogdanoff
  • Nikolas Kaltsoyannis
  • Sebastian Fiechter

Detail(s)

Original languageEnglish
Pages (from-to)52815-52824
Journal / PublicationACS Applied Materials & Interfaces
Volume14
Issue number47
Online published15 Nov 2022
Publication statusPublished - 30 Nov 2022
Externally publishedYes

Abstract

A thiomolybdate [Mo3S13]2- nanocluster is a promising catalyst for hydrogen evolution reaction (HER) due to the high number of active edge sites. In this work, thiomolybdate cluster films are prepared by spin-coating of a (NH4)2Mo3S13 solution both on FTO glass substrates as hydrogen evolving electrodes and on highly 00.1-textured WSe2 for photoelectrochemical water splitting. As an electrocatalyst, [Mo3S13]2- clusters demonstrate a low overpotential of 220 mV at 10 mA cm-2 in 0.5 M H2SO4 electrolyte (pH 0.3) and remain structurally stable during the electrochemical cycling as revealed by in situ Raman spectroscopy. Moreover, as a co-catalyst on WSe2, [Mo3S13]2- clusters enhance the photocurrent substantially by more than two orders of magnitude (from 0.02 to 2.8 mA cm-2 at 0 V vs RHE). The synergistic interactions between the photoelectrode and catalyst, i.e., surface passivation and band bending modification by the [Mo3S13]2- cluster film, promoted HER catalytic activity of [Mo3S13]2- clusters influenced by the WSe2 support, are revealed by intensity-modulated photocurrent spectroscopy and density functional theory calculations, respectively. The band alignment of the WSe2/[Mo3S13]2- heterojunction, which facilitates the electron injection, is determined by correlating UV-vis with photoelectron yield spectroscopy results. © 2022 The Authors. Published by American Chemical Society.

Research Area(s)

  • heterojunction, hydrogen evolving catalyst, molybdenum sulfide, photoelectrochemistry, solar water splitting

Citation Format(s)

Enhancing Hydrogen Evolution Reaction via Synergistic Interaction between the [Mo3S13]2- Cluster Co-Catalyst and WSePhotocathode. / Xi, Fanxing; Bozheyev, Farabi; Han, Xiaoyu et al.
In: ACS Applied Materials & Interfaces, Vol. 14, No. 47, 30.11.2022, p. 52815-52824.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review