Transition metal-doped nickel phosphide nanoparticles as electro- and photocatalysts for hydrogen generation reactions

Ho Wing Man, Chui Shan Tsang, Molly Meng Jung Li, Jiaying Mo, Bolong Huang, Lawrence Yoon Suk Lee, Yun chung Leung, Kwok Yin Wong, Shik Chi Edman Tsang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

54 Citations (Scopus)

Abstract

Transition metal-doped nickel phosphide nanoparticles with metallic properties are prepared by a simple and facile wet-chemical method. It is shown for the first time that these transition metals: iron, cobalt, manganese, and molybdenum, can atomically substitute nickel in the parent hcp phosphide lattice as a single phase without significant change in its metallic structure and morphology. They are employed as electro- and photocatalysts for hydrogen evolution reaction, which show highly tunable activities dependent on electron filling of their metallic bands and H coverage according to our experimental and theoretical rationalizations. Molybdenum-doped nickel phosphide nanoparticle with lower H coverage exhibits the best hydrogen evolution performance in electrocatalytic hydrogen evolution reaction, which also shows excellent photocatalytic hydrogen production with organic photosensitizer. In addition, cobalt-doped nickel phosphide nanoparticle with higher H coverage with aqueous photosensitizer gives more superior hydrogen evolution rate.

Original languageEnglish
Pages (from-to)186-193
Number of pages8
JournalApplied Catalysis B: Environmental
Volume242
DOIs
Publication statusPublished - 1 Mar 2019

Keywords

  • Electrocatalysis
  • Hydrogen evolution reaction
  • Metal doping
  • Nickel phosphide
  • Photocatalysis

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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