▎ 摘　　要

NOVELTY - A supported palladium catalyst contains 10-50 %mass nanocrystalline palladium or palladium nanoalloy loaded on graphene nanocarrier. USE - Supported palladium catalyst is used for oxidation of formic acid (claimed). ADVANTAGE - The supported palladium catalyst having adjustable morphology and size, and excellent dispersibility and activity is efficiently prepared at low reaction temperature, by simple method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of supported palladium catalyst, which involves dissolving palladium salt in oleylamine, to form palladium salt solution having concentration of 5-10 mmol/L or dissolving cobalt salt or nickel salt and palladium salt in oleylamine to form mixed solution with palladium content of 5-10 mmol/L, adding boron-nitrogen compound to palladium salt solution or mixed solution, reacting at 90 degrees C or less for 30-60 minutes, adding an organic precipitating agent, centrifuging mixture, washing and drying mixture to obtain nanocrystalline palladium or palladium nanoalloy, dispersing palladium or palladium nanocrystalline nanoalloy in n-hexane, adding graphene at room temperature, centrifuging mixture, and drying mixture.