▎ 摘　　要

NOVELTY - Preparation of composite nano catalyst involves adding 20 mg surfactant and 5-20 mg graphene oxide to 5 mL water, stirring, adding nickel and platinum precursor salt, stirring, ultrasonically processing for 15 minutes, adding sodium borohydride to the resultant solution, stirring for 30 minutes, subjecting resultant solution to centrifugation, washing and drying. The molar ratio of nickel and platinum is 0.11-9. USE - Preparation of composite nano catalyst used for producing hydrogen (all claimed). ADVANTAGE - The method enables efficient and economical preparation of composite nano catalyst having excellent catalytic property, by a simple process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for composite nano catalyst.