Electrocatalytic nitrate reduction over Cu 2 O nanowires partially decorated with Fe 2 O 3 nanoparticles

A two-step wet impregnation method was developed to synthesize a FeCuO_x bimetallic catalyst featuring a Cu₂O nanowire scaffold as a nanotemplate for anchoring Fe₂O₃ nanoparticles. The catalyst exhibits excellent NO₃RR performance in neutral electrolyte, achieving a faradaic efficiency of 90.3% and an NH₃ yield of 4609.6 µg cm^-2 h^-1, attributed to Cu-Fe interfacial electronic coupling that balances *NO₃ activation on Fe₂O₃ with *NO₂/*NH_x hydrogenation and NH₃ release on Cu₂O, thereby promoting rapid intermediate transfer and suppressing side pathways.