Metal-metalloporphyrin MOF-derived core–shell Ni 3 Fe@FeNi-NC towards high-performance bifunctional oxygen electrocatalysis

Fe@FeNi-NC composite catalyst, characterized by robust interactions, was prepared by the direct pyrolysis of a 2D metal-metalloporphyrin framework. The graphitized carbon coating enhanced electron transfer and stability, resulting in superior bifunctional catalytic activity in the ORR/OER and excellent performance in rechargeable aqueous zinc-air batteries.