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

[Display omitted] •Transition metal-doped nickel phosphides prepared by wet-chemical method.•Fe, Co, Ni and Mo atomic substitute Ni in phosphide lattice as a single phase.•Electro- and photocatalysts for hydrogen evolution reactions.•Tunable activities dependent on electron filling. Transition metal...

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Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2019-03, Vol.242, p.186-193
Main Authors: Man, Ho-Wing, Tsang, Chui-Shan, Li, Molly Meng-Jung, Mo, Jiaying, Huang, Bolong, Lee, Lawrence Yoon Suk, Leung, Yun-chung, Wong, Kwok-Yin, Tsang, Shik Chi Edman
Format: Article
Language:English
Subjects:
Band theory
Cobalt
Electrocatalysis
Evolution
Heavy metals
Hydrogen
Hydrogen evolution reaction
Hydrogen evolution reactions
Hydrogen production
Iron
Manganese
Metal doping
Metals
Molybdenum
Morphology
Nanoparticles
Nickel
Nickel phosphide
Organic chemistry
Phase transitions
Phosphides
Photocatalysis
Photocatalysts
Transition metals
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Summary:[Display omitted] •Transition metal-doped nickel phosphides prepared by wet-chemical method.•Fe, Co, Ni and Mo atomic substitute Ni in phosphide lattice as a single phase.•Electro- and photocatalysts for hydrogen evolution reactions.•Tunable activities dependent on electron filling. 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.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2018.09.103