Cobalt and Yttrium Doping to Activate Dual‐Site Mechanism of Amorphous NiFeOOH for Large‐Current Water Electrooxidation

OH binding at Fe sites. This dual-site modulation reduces adsorption disparity, activates NiFe dual-active centers, and promotes the DSSM pathway, as confirmed by in situ ATR-SEIRAS. The rate-determining step energy is lowered to 1.71 eV, significantly outperforming the conventional AEM pathway (2.51 eV). This work provides dual-site modulation into engineering high-performance NiFe-based OER catalysts for practical water electrolysis.