Title of article :
Enhanced electrocatalytic performance of Pt-based nanoparticles on reduced graphene oxide for methanol oxidation
Author/Authors :
Ji، نويسنده , , Zhenyuan and Shen، نويسنده , , Xiaoping and Zhu، نويسنده , , Guoxing and Chen، نويسنده , , Kangmin and Fu، نويسنده , , Guohua and Tong، نويسنده , , Lei، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
6
From page :
95
To page :
100
Abstract :
Pt-based materials have been widely used as electrocatalysts in direct methanol fuel cells (DMFCs) due to their significant activity for methanol oxidation and the superior poison tolerance. In this study, several Pt-based catalysts (PtSn, PtW, and PtMo) supported on reduced graphene oxide (RGO) are successfully synthesized in an ethylene glycol (EG)-water system for the first time. The microstructure and morphology of the synthesized materials are investigated by X-ray diffraction, Raman spectroscopy, and transmission electron microscopy. It is shown that highly dispersed PtM (M = Sn, W, and Mo) nanoparticles with a size of 2–3 nm are homogeneously deposited on the surface of RGO sheets. Their electrocatalytic performances in methanol oxidation are investigated by cyclic voltammetry and amperometric method. The RGO/PtM catalysts exhibit much higher catalytic activity and stability than the RGO/Pt nanocomposites. Among these RGO/PtM catalysts, RGO/PtSn nanocomposites show the best catalytic performance. It is proposed that the addition of a second element, which creates much more Pt active sites for methanol oxidation, is responsible for the improved catalytic performance. These results imply that the prepared RGO/PtM nanocomposites could be promising electrocatalysts for high-performance DMFCs applications.
Keywords :
methanol oxidation , graphene , nanocomposites , Synthesis , Pt-based catalyst
Journal title :
Journal of Electroanalytical Chemistry
Serial Year :
2012
Journal title :
Journal of Electroanalytical Chemistry
Record number :
1676110
Link To Document :
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