Coconut shell activated carbon (AC) was used as carrier to covalently immobilize Pd2 complex. The content of hydroxyl groups on the carbon surface was increased to 0.383 mmol/g after 20% HNO3 oxidation. Nitrogen-containing bidentate ligand was synthesized by grafting the oxidized AC with N,N’-bis[(triethoxysilyl)propyl]-1,2-cyclohexanediamine, followed by Pd2 complexation. The ICP result shows that the Pd2 loading capacity reached 0.79%. The samples were characterized by FT-IR, XPS and N2 adsorption-desorption. Diphenyl carbonate (DPC) was synthesized in a high pressure reaction vessel by oxidative carbonylation of phenol over the AC loaded Pd2 complex catalyst. The optimum operation conditions were determined as follows: reaction temperature of 100 ℃, reaction pressure of 7.0 MPa, reaction time of 5 h, and CH2Cl2 was used as solvent. The DPC yield reached 7.43% under the above conditions.