Amorphous and outstandingly stable Ni(OH)2·0.75H2O@Ni(OH)2/FeOOH heterojunction nanosheets for efficient oxygen evolution performance†

Abstract

Amorphous and multilevel two-dimensional Ni(OH)₂·0.75H₂O@Ni(OH)₂/FeOOH heterojunction nanosheets with efficient OER catalytic activity (only 270 mV overpotential at 100 mA cm⁻² and very low Tafel slope of 44 mV dec⁻¹) and outstanding stability (more than 100 h at 100 mA cm⁻²) were synthesized, the electrocatalytic properties of which could be adjusted through regulating the Ni electronic structure by doping Fe element.