Single-Step Electrodeposition of FeCo-Based Anode Catalyst with Phosphorus for Efficient Anion Exchange Membrane Water Electrolysis

The development of robust electrocatalysts for the oxygen evolution reaction (OER) in anion exchange membrane water electrolysis (AEMWE) is critical for cost-effective green hydrogen production. In this study, we synthesized phosphorus-doped bimetallic FeCo-based catalysts via a single-step electrodeposition method. The optimized FeCoP50 catalyst exhibited an overpotential of 193 mV at 10 mA cm^–2 for the OER in a half-cell system and achieved a current density of 5.48 A cm^–2 at 2.0 V in an AEMWE system. The introduction of phosphorus effectively enhances both the electrochemical surface area and the intrinsic activity of the FeCo-based catalyst. This work demonstrates the effectiveness of a one-pot synthesis of the FeCo-based electrocatalysts for AEMWE and elucidates the beneficial role of phosphorus doping.