W Doping in Ni₁₂P₅ as a Platform to Enhance Overall Electrochemical Water Splitting.

ABSTRACT: Bifunctional electrocatalysts for efficient hydrogen generation from water splitting must overcome both the sluggish water dissociation step of the alkaline hydrogen evolution half-reaction (HER) and the kinetic barrier of the anodic oxygen evolution half-reaction (OER). Nickel phosphides are a promising catalysts family and are known to develop a thin active layer of oxidized Ni in an alkaline medium. Here, Ni₁₂P₅ was recognized as a suitable platform for the electrochemical production of γ-NiOOH─a particularly active phase─because of its matching crystallographic structure. The incorporation of tungsten by doping produces additional surface roughness, increases the electrochemical surface area (ESCA), and reduces the energy barrier for electron-coupled water dissoci

SUBMITTER: Ghosh S 

PROVIDER: S-EPMC8762645 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature