Dynamic Reconstruction of Ce‐Doped Fe₂P/NiCoP Hybrid for Ampere‐Level Oxygen Evolution in Anion Exchange Membrane Water Electrolysis

Abstract The sluggish kinetics of the oxygen evolution reaction (OER) critically limit the efficiency of anion exchange membrane water electrolysis (AEMWE). Herein, a Ce‐doped bimetallic Fe₂P/NiCoP hybrid pre‐catalyst that undergoes dynamic reconstruction to activate a highly efficient OER pathway is designed. The optimized Ce_0.1‐Fe₂P/NiCoP exhibits an impressively low overpotential of 280 mV at 0.5 A cm⁻² and a small Tafel slope of 55.3 mV dec⁻¹ in a 1.0 M KOH. Remarkably, when integrated as the anode in an AEMWE electrolyzer, it delivers a low cell voltage of 1.812 V at 1.0 A cm⁻² and maintains stable performance for over 500 h at 60 °C. In situ characterizations and density functional theory (DFT) calculations reveal that Ce‐doping enhances surface reconstruction and modulates the electronic structure, thereby reducing energy barriers for intermediates (ΔG_*OH and ΔG_*OOH) formation and accelerating OER kinetics. This work introduces a novel strategy to utilize catalyst reconstruction, advancing their applications in AEMWE systems.