Electron Rearrangement and Surface Reconstruction Improve the High Efficiency Water Oxidation Performance of Amorphous Fe-P-B Catalyst

In view of the limitation of powder catalyst in oxygen evolution reaction, an amorphous Fe-P-B/NF oxygen evolution catalyst based on rapid dealloying strategy was developed. Through a collaborative mechanism of dynamic surface reconstruction and electron rearrangement, the material exhibits excellent catalytic activity and stability at high current density: only 246 mV overpotential at 100 mA cm⁻², and stable operation for more than 200 hours at 250 mA cm⁻². Combined with multi-scale characterization techniques, the internal mechanism of material performance improvement was revealed: XPS confirmed that dealloying caused surface electron rearrangement; Raman spectroscopy and HRTEM analysis show that abundant structural defects and multiphase FeOOH are formed on the catalyst surface after stability test, which is due to the accelerated surface reconstruction kinetics of anion leaching. In situ infrared spectroscopy reveals abundant superoxide species (OO_Had) on the catalyst surface during OER, accelerating the third AEM step kinetics and boosting oxygen evolution rates. This study provides theoretical/practical guidance for the design of amorphous catalysts by constructing dynamic surfaces and optimizing electron transport.