▎ 摘　　要

NOVELTY - Graphene layer-coated cerium dioxide-loaded palladium nanoparticle catalyst, prepared by using deposition-precipitation method to load the palladium nitrate on the cerium dioxide particles, then reducing by hydrogen to obtain cerium dioxide loaded with palladium nano particles, then using chemical vapor deposition (CVD) method to high temperature cracking the ethylbenzene to form graphene of cerium dioxide coated on the surface of cerium dioxide loaded with palladium nano particles. USE - The graphene layer-coated cerium dioxide-loaded palladium nanoparticle catalyst is useful in acetylene selective hydrogenation (claimed). ADVANTAGE - The palladium-cerium catalyst: can show good catalytic hydrogenation performance with low noble metal palladium loading amount; is good for industrial production of acetylene selective hydrogenation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the catalyst, comprising (i) preparing cerium dioxide dispersion and palladium nitrate solution, adjusting the pH of cerium dioxide dispersion and palladium nitrate solution to alkaline, heating cerium dioxide dispersion liquid, dropping palladium nitrate solution into cerium dioxide dispersion liquid for reaction, cooling to room temperature, filtering, washing, drying and grinding, (ii) performing hydrogen reduction to the grinded product at high temperature to obtain the cerium dioxide loaded with palladium nano particles, and (iii) taking two tubular furnaces and placing in series, inserting one quartz tube into two tubular furnaces, and simultaneously taking cerium dioxide loaded with palladium nano particles in the quartz tube of the left tubular furnace, taking ethylbenzene in the quartz tube of the right tubular furnace, using inert gas to blow the two serially connected tubular furnaces, respectively heating, blowing the evaporated ethyl benzene to tubular furnace loaded with cerium dioxide of palladium nano particles, after finishing reaction, cooling, obtaining the catalyst.