▎ 摘　　要

NOVELTY - Preparing catalyst comprises adding graphene oxide as carrier and nano palladium as active component by an ultrasonic dispersion method. USE - The method is useful for preparing catalyst (claimed), which is useful for hydrogenation reaction of olefins, nitrobenzene, and cinnamic aldehyde. ADVANTAGE - The method is capable of preparing the catalyst with good stability, and high reusability and catalytic activity in an eco-friendly manner.