Hydrogen Coverage-Driven Interfacial Water Restructuring Boosts Alkaline Hydrogen Oxidation

Hydrogen binding energy (HBE) is a key thermodynamic descriptor for the hydrogen oxidation reaction (HOR), yet its influence on the interfacial water structure in the electric double layer (EDL) and reaction kinetics, particularly as modulated by adsorbed hydrogen (Had) coverage, remains poorly understood. Here, we employ a WO3-supported Ir nanoparticle catalyst (WO3–Ir) to elucidate the impact of Had coverage on the EDL structure and HOR kinetics in alkaline media. By integrating electrochemica