Grapheme is a material of great interest due to its diverse applications in electronics,catalytic electrodes,and sensors.However,few studies have been conducted to use the graphene or graphene supported catalyst for the gas-solid catalytic reactions.In this paper,the graphene supported palladium (Pd) catalyst has been prepared using the conventional impregnation and a simple,low cost,high-efficient hydrogen reduction method.Highly dispersed nanoparticles are formed on the support graphene.The Raman and X-ray photoelectron spectroscopy characterization show the existence of oxygen containing groups even after hydrogen reduction.Based on DFT total energy calculations and thermodynamic analyses,the Pd nanoparticles is stable on the grapheme sheets with oxygen groups.