Abstract:Electrolytic hydrogen production from water has garnered significant attention in hydrogen generation due to its clean，efficient，and technologically straightforward advantages. However，the oxygen evolution reaction（OER）impedes the reaction rate of water electrolysis， and commercial catalysts are all precious metals，which are costly and scarce. Therefore，the design of catalysts with favourable economics and high performance is imperative. To address this，a nickel-iron phosphide catalyst（NiFeP₃）is synthesised via hydrothermal and chemical vapour deposition methods. Exhibiting a spherical nanocluster structure， it demonstrates outstanding OER performance under alkaline conditions. At a current density of 10 mA/cm²，it exhibits an overpotential of merely 249 mV and a Tafel slope of 72.87 mV/dec. Furthermore，after 48 hours of chronoamperometric stability testing，NiFeP₃ retains 90% of its catalytic activity， demonstrating commendable stability.