Enhanced Redox Cycling of FeyO by Cr-Doping over Oxygen Electrode for Rechargeable Zinc-Air Batteries

The carbon-based bimetallic oxide catalyst (CrxO-FeyO/NC) synthesized by calcination method achieves excellent oxygen electrocatalytic activity through the electronic effect of the Cr-Fe interface, with an ORR half-wave potential of 0.89 V and a low overpotential of 351 mV at 50 mA cm-2 under OER.