▎ 摘　　要

NOVELTY - Preparing high performance palladium or graphene oxide catalyst, comprises (i) dissolving graphene, polyvinylpyrrolidone and palladium(II)-ammonium chloride by adding water, to obtain mixed solution; (ii) ultrasonically dispersing the mixed solution in uniform manner, adding formic acid, ultrasonically mixing continuously; (iii) subjecting the ultrasonically mixed solution to hydro-thermal reaction; and (iv) cleaning, and drying the mixed solution to obtain the catalsyt. USE - The catalyst is useful in direct-formic acid fuel cells, and in energy conversion fields. ADVANTAGE - The catalyst prepared has long-term stable property; and is simple, and suitable for large scale production.