Hierarchical mesoporous N-doped carbon as an efficient ORR/OER bifunctional electrocatalyst for rechargeable zinc–air battery

Hierarchical mesoporous NDC-800 catalyst with rich N–C sites and defects exhibits ORR/OER bifunction activity and zinc–air battery properties over 20% Pt/C. DFT shows that N doping and defects have synergy, significantly improves performance.