Densely Accessible Fe/Co-Nx Dual-atom Sites Coupled Core-shell Co3Fe7@C as an Efficient Bifunctional Oxygen Electrocatalyst for Rechargeable Zinc-air Batteries

The symmetric electronic structure of an Fe single-atom site catalyst was effectively regulated by incorporating Co–N x sites and core–shell Co 3 Fe 7 @C nanoparticles, resulting in high performance towards the ORR and Zn–air batteries.