ZIF-L-derived autocatalytic growth of Fe, N co-doped carbon nanotubes to form a hierarchical porous structure as an efficient oxygen reduction and oxygen evolution catalyst for Zn–air batteries

The hierarchical porous Fe–N–C catalyst with self-catalytic growth of carbon nanotube coated nanoparticles exhibited satisfactory electrocatalytic performances for the reactions in charge–dischargeable Zn–air batteries.