▎ 摘　　要

NOVELTY - A platinum-based catalytic system preparing method involves preparing a uniformly dispersed graphene oxide aqueous dispersion. Aniline is dissolved in hydrochloric acid solution, and the graphene oxide aqueous dispersion prepared is added to the aniline solution, ultrasonically dispersed, stirred and hydrogen peroxide is added to obtain a mixed solution, where the mixed solution is dark green. The obtain solution is centrifuged and separated to obtain the green product, which is washed and dried. The prepared polyaniline-graphene oxide is uniformly dispersed in ultrapure water by ultrasound. The aqueous solution of nickel chloride hexahydrate and the aqueous solution of chloroplatinic acid are added to the dispersion, stirred, and the sodium borohydride solution is slowly added to the solution and stirred to obtain a black product, which is washed, dried and centrifuged. USE - Method for preparing a platinum-based catalytic system for a formic acid fuel cell. ADVANTAGE - The method enables using the direct oxidation pathway of formic acid and alleviating the problem of catalyst carbon monoxide poisoning.