Catalysis Letters, Vol.105, No.1-2, 59-65, 2005
Preparation of polymer-stabilized palladium-silver bimetallic nanoparticles by gamma-irradiation and their catalytic properties for hydrogenation of cis,cis-1,3-cyclooctadiene
Polyvinypyrrolidone (PVP)-stabilized Pd-Ag bimetallic colloids were successfully prepared in an acetone:2-propanol solution mixture of palladium acetate and silver perchlorate, and in an aqueous solution of palladium nitrate and silver nitrate by cirradiation. The prepared PVP-stabilized bimetallic nanoparticles were characterized by UV, TEM, XRD, and XPS. In Pd-Ag bimetallic nanoparticles, the XPS data indicated that the constituent elements were in the metallic state, and the palladium atoms were concentrated on the surface of the alloy cluster. These PVP-stabilized bimetallic nanoparticles were used as catalysts for hydrogenation of cis,cis-1,3-cyclooctadiene (COD).
Keywords:gamma-irradiation;precious bimetallic nanoparticles;Pd-Ag nanoparticles;polyvinylpyrrolidone;cis;cis-1;3-cyclooctadiene (COD);hydrogenation catalysts