▎ 摘　　要

NOVELTY - Preparing graphene supported palladium iridium nano particle catalyst comprises (i) adding graphene to formic acid solution, ultrasonically mixing uniformly, (ii) uniformly dispersing solution of chloroiridic acid and sodium chloropalladate, dispersing under ultrasonic condition, (iii) heating obtained mixed solution, (iv) injecting mixed solution obtained in step (iii) to step (i) under ultrasonic treatment, sealing condition, and (v) washing and drying to obtain product. USE - The catalyst is useful in formic acid oxidation catalytic reaction (claimed). ADVANTAGE - The method: does not involve use of toxic material; has simple operation, high repeatability ;and is suitable for mass production. The catalyst has high electrochemical activity over the specific surface area and acid oxidation catalytic activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene supported palladium iridium nano particle catalyst.