Deriving paired Fe sites on N-doped carbon from Fe(iii)-tetrapyridinylporphyrin-modified ZIF-8: robust electrocatalysts for air electrodes in zinc–air batteries

An efficient ORR electrocatalyst composed of homonuclear paired Fe sites coordinated onto N-doped carbon (Fe 2 –N–C-900) is synthesized by pyrolyzing FeTPyP-modified ZIF-8. The catalyst has better activity and stability than the commercial Pt/C.