Enhanced Hydrogen Evolution Activity of Phosphorus-Rich Tungsten Phosphide by Cobalt Doping : A Comprehensive Study of the Active Sites and Electronic Structure

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

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Author(s)

  • Yixuan Yang
  • Xiaoyu Feng
  • Zhizhong Liu
  • Xuming Zhang
  • Hao Song
  • Chaoran Pi
  • Biao Gao
  • Kaifu Huo

Detail(s)

Original languageEnglish
Pages (from-to)1658-1664
Journal / PublicationChemElectroChem
Volume8
Issue number9
Online published14 Apr 2021
Publication statusPublished - 3 May 2021

Abstract

Phosphorus-rich transition metal phosphides (TMPs) are considered efficient electrocatalysts for the hydrogen evolution reaction (HER). However, the actual activity of P-rich TMPs is not as good as expected because of the undesirable electronic structure. Transition metal doping has been shown to be effective in improving the HER activity of TMPs in both acid and alkaline media, but the underlying mechanism is ambiguous, especially for P-rich TMPs. Herein, cobalt-doped and phosphorus-rich tungsten phosphide nanowire arrays (Co/WP2 NWs/CC) are synthesized and the electrochemical properties and mechanism are determined by both experiments and theoretical calculation. The results reveal that Co dopants serve as inert catalytic sites and do not participate in HER process, but the Co/WP2 NWs/CC exhibits enhanced electrocatalytic activity as a result of the lower water dissociation barrier and hydrogen adsorption/desorption free energy on W or P sites and improved conductivity by strong electron-donating effects of Co dopants, thereby boosting the catalytic activity and kinetics.

Research Area(s)

  • active centers, cobalt doping, electronic structure, hydrogen evolution reaction, transition metal phosphides

Citation Format(s)

Enhanced Hydrogen Evolution Activity of Phosphorus-Rich Tungsten Phosphide by Cobalt Doping : A Comprehensive Study of the Active Sites and Electronic Structure. / Yang, Yixuan; Feng, Xiaoyu; Liu, Zhizhong; Zhang, Xuming; Song, Hao; Pi, Chaoran; Gao, Biao; K Chu, Paul; Huo, Kaifu.

In: ChemElectroChem, Vol. 8, No. 9, 03.05.2021, p. 1658-1664.

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