▎ 摘　　要

NOVELTY - Method for preparing pyridine type or pyrrole type iron-nitrogen site catalyst, involves (a) mixing and dispersing soluble iron salt, nitrogen-containing polymer monomer, conductive carbon carrier and inorganic acid aqueous solution to obtain a suspension, (b) adding a polymerization initiator to the suspension, performing polymerization under stirring, separating, drying, and grinding to obtain iron-doped nitrogen-containing polymer precursor powder, and (c) calcining the precursor powder in an inert atmosphere or an ammonia atmosphere, acid washing and drying to obtain the desired catalyst. USE - The method is used for preparing pyridine type or pyrrole type iron-nitrogen site catalyst in oxygen reduction battery system for fuel cell or metal air battery (claimed). ADVANTAGE - The method uses cheap and easily available raw materials, has simple preparation process, and is suitable for industrial mass production. The high-purity iron-nitrogen site catalyst has excellent intrinsic catalytic activity, oxygen adsorption capacity, complete four-electron reaction selectivity, lower hydrogen peroxide yield, and excellent oxygen reduction performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a pyridine-type iron-nitrogen site catalyst prepared by the above method, where the molar ratio of iron and nitrogen atom in the pyridine-type iron-nitrogen site catalyst is 1:(4-12); and (2) a pyrrole-type iron-nitrogen site catalyst prepared by the above method, where the molar ratio of iron and nitrogen in the pyrrole-type iron-nitrogen site catalyst is 1:(4-12).