Fluorine anion-enriched nickel hydroxyl oxide as an efficient oxygen evolution reaction electrocatalyst

Abstract

F⁻ anion-enriched Ni hydroxyl oxide (F-NHO) mesocrystalline microspheres were prepared by a facile hydrothermal hydrolysis of a Ni precursor mediated by NH₄F. The quasi monocrystalline structure, superhydrophilic surface and high F⁻ anion-doping level of F-NHO enable high catalytic efficiency for the oxygen evolution reaction in the electrolysis of water.