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Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
Published on: September 22, 2015
Enhanced electrocatalytic activity of Pt nanoparticles supported on functionalized graphene for methanol oxidation
Junhong Ma1, Li Wang2, Xue Mu1
1Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, People's Republic of China; College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, People's Republic of China.
Abstract:
Reduced graphene oxide (RGO) is modified with 1,1'-dimethyl-4,4'-bipyridinium dichloride (methyl viologen, i.e. MV) by a π-π interaction, and further used as support for immobilization of Pt nanoparticles to prepare a Pt/MV-RGO catalyst for direct methanol fuel cells. Transmission electron microscopy, X-ray powder diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy are used to characterize the morphology and microstructure of the prepared catalyst. Electrocatalytic performance of the as-prepared Pt/MV-RGO hybrid is investigated by cyclic voltammetry, linear scan voltammetry, COads stripping voltammetry and electrochemical impedance spectroscopy. The Pt/MV-RGO hybrid exhibits much higher catalytic activities than Pt/RGO toward both methanol oxidation and oxygen reduction, suggesting that Pt/MV-RGO hybrid could be a promising electrocatalyst for high-performance direct methanol fuel cells applications.
