Tuning of metallic valence in CoMoP for promoting electrocatalytic hydrogen evolution

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

19 Scopus Citations
View graph of relations

Author(s)

  • Dan Li
  • Dongyu Liu
  • Shuang Zhao
  • Yaming Ma
  • Mingtao Li
  • Guangbo Chen
  • Yuankun Wang
  • Guoqing Zhou
  • Chunhui Xiao

Detail(s)

Original languageEnglish
Pages (from-to)31072-31081
Number of pages10
Journal / PublicationInternational Journal of Hydrogen Energy
Volume44
Issue number59
Online published31 Oct 2019
Publication statusPublished - 29 Nov 2019
Externally publishedYes

Abstract

CoMoPx-based electrocatalysts are promising for hydrogen evolution reaction (HER) but suffer from high overpotential and poor stability at large current density. Herein, we propose CoMoP@NF in lower valence states by thorough phosphorization which improves the adhesion of the catalysts on substrate and facilitates the Volmer step. The CoMoP@NF can reach 39 mV at 10 mA cm-2, 119 mV at 100 mA cm-2, and a low Tafel slope of 73.3 mV per decade. The decline of i-t test in 10 h at ~370 mA cm-2 is only 1 mA cm-2. Theoretical calculations confirm the rational design of CoMoP whose ΔGH* is as low as 0.15 and 0.01 eV corresponding to (013) and (211) facets, respectively. Electrons transfer from Co to Mo results in middle d band center of CoMoP that promotes H adsorption and desorption.

Research Area(s)

  • Transition-metal phosphide, Electrocatalyst, Hydrogen evolution reaction(HER), d band center

Citation Format(s)

Tuning of metallic valence in CoMoP for promoting electrocatalytic hydrogen evolution. / Li, Dan; Liu, Dongyu; Zhao, Shuang et al.

In: International Journal of Hydrogen Energy, Vol. 44, No. 59, 29.11.2019, p. 31072-31081.

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