▎ 摘　　要

NOVELTY - A carbon nanotube-supported nitrogen-doped graphene-coated platinum nanocomposite material is prepared by loading platinum nanoparticle onto acidified carbon nanotube by wet chemical reduction method, and coating with nitrogen-doped graphene layer via chemical vapor deposition method. USE - Method for preparing carbon nanotube-supported nitrogen-doped graphene-coated platinum nanocomposite material for phenylacetylene catalytic hydrogenation (claimed). ADVANTAGE - The product can effectively catalyze the conversion of phenylacetylene to styrene, has high selectivity and conversion rate, is not easy to deactivate during the reaction process and has good cycle stability. It can be recycled 4-5 times. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for phenylacetylene catalytic hydrogenation method comprising taking phenylacetylene, n-octane ethanol solution and carbon nanotube-supported nitrogen-doped graphene-coated platinum nanocomposite material, pumping 0.04 MPa argon gas, heating at 30-60 degrees C, pumping 0.1-0.4 MPa hydrogen gas, and reacting at 50 degrees C for 100-140 minutes.