▎ 摘　　要

NOVELTY - Preparing atomically dispersed catalyst ultrasonically dispersing graphene powder in deionized water to obtain graphene dispersion, adjusting pH values of graphene dispersion and palladium (II) nitrate aqueous solution to graphene dispersion palladium (II) nitrate aqueous solution at 100 degrees C for 1 hour. The formed mixture is cooled at room temperature, filtered, washed with deionized water, and dried at 60 degrees C for 12 hours. The resulting product is charged in reaction tube in a tube furnace for in-situ reduction. The inert gas argon is introduced for purging for 20-30 minutes to obtain nano-particle catalyst. The obtained nano-particle catalyst is put into a quartz cup and polytetrafluoroethylene liner, and then placed in a reactor. The inert gas argon is passed for 20-30 minutes, and then reduced at 200 degrees C for 60 minutes to obtain the atomic-level dispersed catalyst. USE - Method for preparing atomically dispersed catalyst used as catalyst in selective hydrogenation of phenylacetylene (claimed). ADVANTAGE - The method prepares the atomically dispersed catalyst in a simple, cost-effective and eco-friendly manner with better catalytic performance for selective hydrogenation of phenylacetylene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for using atomically dispersed catalyst, which involves: (A) taking reaction vessel equipped with an atomically dispersed palladium catalyst prepared by nitric acid vapor method; (B) adding reactant phenylacetylene solution and ethanol solution; (C) passing argon as balance gas; (D) discharging air in the kettle; (E) introducing hydrogen with a pressure of 0.2 MPa; and (F) carrying out selective hydrogenation of phenylacetylene under reaction conditions of 35 degrees C.