▎ 摘　　要

NOVELTY - Preparation of iron atom-supported graphene-based nanomaterial involves adding 50-100 mg anhydrous ferric chloride to 25 ml volumetric flask, then adding tetrahydrofuran to dissolve anhydrous ferric chloride, obtaining 3 mg/ml ferric chloride solution, adding 10-20 mg graphene oxide to 25 ml volumetric flask, then adding tetrahydrofuran to dissolve graphene oxide, adding 126 mu L 3 mg/ml ferric chloride solution, stirring by a magnetic stirrer for 12-36 hours until the solvent tetrahydrofuran is completely volatilized and a solid mixture is formed, grinding the solid mixture into powder, adding the powder to a calcination vessel, placing the calcination vessel in a high-temperature furnace, heating at rate of 1-10 degrees C/minute from room temperature of 25 degrees C to 400-600 degrees C at a heating rate of 1-10 degrees C/min, heat-preserving for 1-3 hours, and cooling calcined material to room temperature. USE - Preparation of iron atom-supported graphene-based nanomaterial used in catalyst (claimed). ADVANTAGE - The method enables preparation of iron atom-supported graphene-based nanomaterial with high active site density and single-atom loading amount. The inert atmosphere used for combustion is safe.