An iron cation double isolated strategy is applied to construct Fe, N-containing porous biomass carbon oxygen reduction reaction (ORR) electrocatalysts. Two different activating agents, Zn(NO 3) 2 and ZnCl 2 , are used respectively, using one-pot co-pyrolysis over the rangooncreeper fruit (RF) biomass template absorbed with the Fe-PPy (Fe 3þ-bonded by polypyrrole matrix) and Fe-bipyridine (Fe 3þ-bonded by 2,2-bipyridine ligands). It is found that the resulting product Zn(NO 3) 2-Fe