title: Synthesis of Pt-Ru@PThB catalyst by gamma-irradiation and NaBH(4) as reducing agent.
abstract: Pt-Ru particles were loaded onto spherical polythiophene balls (PThB) and new catalysts, Pt-Ru@PThBs, were prepared. Pt and Ru ions were subjected to chemical reduction using NaBH(4) as reducing agent or gamma-irradiation in the presence of PThBs. The size, morphology, and composition of Pt-Ru@PThB catalysts were determined by transmission electron microscope (TEM), X-ray diffraction (XRD) and elemental analysis. TEM images of the Pt-Ru@PThB catalysts clearly provide evidences that Pt-Ru alloy nanoparticles are dispersed onto the surface of PThBs. The electrocatalytic efficiency of Pt-Ru@PThB was tested for electrochemical oxidation of carbon monoxide as well as for methanol. Pt-Ru@PThB catalyst prepared by gamma-irradiation exhibits the enhanced electrocatalytic oxidation of CO and methanol. We envisage that Pt-Ru@PThB catalysts are suited for direct methanol fuel cells.
authors.affiliation: Department of Chemistry, BK 21 NanoBiosensor Research Team, Hannam University, Daejeon 305-811, Republic of Korea.
authors.forename: Jung-Ho
authors.initials: JH
authors.lastname: Ryu
authors.forename: Sung-Hee
authors.initials: SH
authors.lastname: Jung
authors.forename: Kwang-Sik
authors.initials: KS
authors.lastname: Sim
authors.forename: Seong-Ho
authors.initials: SH
authors.lastname: Choi
mesh_terms: D001894:Borohydrides; D002384:Catalysis; D004736:Energy-Generating Resources; D005720:Gamma Rays; D000432:Methanol; D010984:Platinum; D011108:Polymers; D011868:Radioisotopes; D012428:Ruthenium; D013876:Thiophenes
chemical_list: D001894:Borohydrides; D011108:Polymers; D011868:Radioisotopes; D013876:Thiophenes; C066730:polythiophene; D010984:Platinum; D012428:Ruthenium; C025364:sodium borohydride; D000432:Methanol