▎ 摘　　要

NOVELTY - Preparation of fluorine, sulfur, nitrogen co-doped iron-nitrogen-carbon fuel cell oxygen reduction catalyst involves ultrasonically dispersing graphene oxide in deionized water, obtaining solution (A), ultrasonically dissolving ferrocenylmethyltrimethylammonium iodide in absolute ethanol, obtaining solution (B), dripping 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and solution (B) to the solution (A) under magnetic stirring, adding melamine, magnetically stirring, drying, pyrolyzing in nitrogen atmosphere, grinding obtained sample with agate mortar, mixing obtained catalyst powder and 0.5M sulfuric acid solution, then magnetically stirring, acid-washing, vacuum-filtering, washing with deionized water, then transferring to a Petri dish, drying in the constant temperature oven, transferring the dried catalyst powder to the crucible, calcining in nitrogen atmosphere, and grinding resultant sample with agate mortar. USE - Preparation of fluorine, sulfur, nitrogen co-doped iron-nitrogen-carbon cathode oxygen reduction catalyst of proton exchange membrane fuel cell. ADVANTAGE - The method enables efficient preparation of fluorine, sulfur, nitrogen co-doped iron-nitrogen-carbon fuel cell oxygen reduction catalyst with high heteroatom doping rate, by simple and environmentally-friendly process. The catalyst exhibits excellent oxidation reduction reaction electrocatalytic activity than platinum/carbon, stability and methanol resistance under alkaline and acid conditions. DETAILED DESCRIPTION - Preparation of fluorine, sulfur, nitrogen co-doped iron-nitrogen-carbon fuel cell oxygen reduction catalyst involves ultrasonically dispersing 50 mg graphene oxide in 10 mL deionized water for 3 hours, obtaining solution (A), ultrasonically dissolving 50 mg ferrocenylmethyltrimethylammonium iodide in 1 mL absolute ethanol for 1 hour, obtaining solution (B), dripping 0.75 mL 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and 1 mL solution (B) to the solution (A) using a pipette under magnetic stirring, adding 100 mg melamine, magnetically stirring for 24 hours, drying in constant temperature oven at 60 degrees C, transferring the dried paste mixture precursor to a covered crucible, placing the crucible in a tubular furnace, heating at rate of 5 degrees C/minute, pyrolyzing at 900 degrees C for 1 hour in nitrogen atmosphere, grinding obtained sample with agate mortar for 20 minutes to obtain catalyst powder before acid-washing, mixing the catalyst powder and 0.5M sulfuric acid solution in a ratio of 1 mg:1 mL, then magnetically stirring, acid-washing in a constant temperature oil bath at 80 degrees C for 6 hours, vacuum-filtering, washing 5 times with deionized water, then transferring to a Petri dish, drying at 60 degrees C for 1-2 hours in the constant temperature oven, transferring the dried catalyst powder to the crucible, placing the crucible in the tube furnace, heating at rate of 5 degrees C/minute, calcining at 900 degrees C for 1 hour in nitrogen atmosphere, and grinding resultant sample with agate mortar for 20 minutes.