title: Platinum nanoparticles on porphyrin functionalized graphene nanosheets as a superior catalyst for methanol electrooxidation.
abstract: A novel nanostructured catalyst of platinum nanoparticles supported on 5,10,15,20-tetrakis(1-methyl-4-pyridinio)porphyrin tetra(p-toluenesulfonate) (TMPyP) functionalized graphene (TMPyP-graphene) is synthesized by the hydrothermal polyol process. The as-synthesized nanocomposites are characterized by Fourier transform infrared (FTIR) spectroscopy, UV-vis absorption spectroscopy, Raman spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and electrochemical tests. It has been found that Pt nanoparticles of ca. 3.4 nm are uniformly dispersed on the surface of TMPyP-graphene, and hold a high electrochemical active surface area (ECSA) of 126.2 m(2) g(-1). The results demonstrate that the Pt/TMPyP-graphene catalyst exhibits a much higher electrocatalytic activity and stability than the Pt/graphene and commercial Pt/C catalysts for methanol oxidation, which is of significant importance in improving the efficiency of Pt-based electrocatalysts for DMFCs applications.
authors.affiliation: Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China. youjunfan@mailbox.gxnu.edu.cn.
authors.forename: Rui-Xiang
authors.initials: RX
authors.lastname: Wang
authors.forename: Jing-Jing
authors.initials: JJ
authors.lastname: Fan
authors.forename: You-Jun
authors.initials: YJ
authors.lastname: Fan
authors.forename: Jing-Ping
authors.initials: JP
authors.lastname: Zhong
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Shi-Gang
authors.initials: SG
authors.lastname: Sun
authors.forename: Xing-Can
authors.initials: XC
authors.lastname: Shen