▎ 摘　　要

NOVELTY - Preparing iron cobalt (FeCo) alloy-nitrogen-doped graphene hierarchical porous aerogel involves dispersing the graphene oxide dispersion liquid after ultrasonic treatment in Tris-hydrogen chloride (HCl) buffer solution, then adding nitrogen source solution, then adding the mixed solution of iron (Fe) source and cobalt (Co) source, mixing, carrying out hydrothermal reaction, washing, and freeze-drying to obtain aerogel. The aerogel is subjected to high temperature heat treatment, washed and dried to obtain FeCo alloy-nitrogen-doped graphene hierarchical porous aerogel. USE - Method for preparing iron cobalt (FeCo) alloy-nitrogen-doped graphene hierarchical porous aerogel used as a catalyst for oxygen reduction reaction for metal-air battery positive electrode material (all claimed). ADVANTAGE - The prepared FeCo alloy-nitrogen-doped graphene aerogel with optimized pore structure has more mesopores and micropores, larger specific surface area, exhibits higher onset potential and limiting diffusion current density in the oxygen reduction reaction, and has excellent oxygen reduction reaction (ORR) activity.