In Situ Incorporation Strategy for Bimetallic FeCo-Doped Carbon as Highly Efficient Bifunctional Oxygen Electrocatalysts

Abstract Highly efficient bifunctional oxygen reduction reaction/oxygen evolution reaction (ORR/OER) electrocatalysts are of great significance for developing rechargeable metal–air batteries. A facile in situ incorporation strategy was proposed to introduce an iron‐based complex into a cobalt‐based ZIF‐67 framework. The resultant FeCo−N/C exhibited an excellent ORR activity with a high half‐wave potential of 0.84 V and simultaneous outstanding OER activity with a low overpotential of 370 mV at a current density of 10 mA cm −2 in 0.1 M KOH. The overall oxygen electrode activity was calculated to be as low as 0.77 V. This work provides new opportunities for the development of highly efficient bifunctional electrocatalysts.