Synergistic WO3·2H2O Nanoplates/WS2 Hybrid Catalysts for High-Efficiency Hydrogen Evolution

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Lun Yang
  • Xiaobin Zhu
  • Shijie Xiong
  • Xinglong Wu
  • Yun Shan

Detail(s)

Original languageEnglish
Pages (from-to)13966-13972
Journal / PublicationACS Applied Materials and Interfaces
Volume8
Issue number22
Online published23 May 2016
Publication statusPublished - 8 Jun 2016

Abstract

Tungsten trioxide dihydrate (WO3·2H2O) nanoplates are prepared by in situ anodic oxidation of tungsten disulfide (WS2) film on carbon fiber paper (CFP). The WO3·2H2O/WS2 hybrid catalyst exhibits excellent synergistic effects which facilitate the kinetics of the hydrogen evolution reaction (HER). The electrochromatic effect takes place via hydrogen intercalation into WO3·2H2O. This process is accelerated by the desirable proton diffusion coefficient in the layered WO3·2H2O. Hydrogen spillover from WO3·2H2O to WS2 occurs via atomic polarization caused by the electric field of the charges on the planar defect or edge active sites of WS2. The optimized hybrid catalyst presents a geometrical current density of 100 mA cm–2 at 152 mV overpotential with a Tafel slope of ∼54 mV per decade, making the materials one of the most active nonprecious metal HER catalysts.

Research Area(s)

  • hydrogen evolution, spillover effect, synergism, WO3·2H2O, WS2

Citation Format(s)

Synergistic WO3·2H2O Nanoplates/WS2 Hybrid Catalysts for High-Efficiency Hydrogen Evolution. / Yang, Lun; Zhu, Xiaobin; Xiong, Shijie; Wu, Xinglong; Shan, Yun; Chu, Paul K.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 22, 08.06.2016, p. 13966-13972.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review