Study of Anode’s Reaction Mechanism and Tolerance of Carbon Monoxides on Direct Methanol Fuel Cell by Using Electrochemical Fabricated Nano-Metals Alloy Clusters

The study investigates the fabrication conditions of Platinum and Gold nanoparticles on carbon substrates by using pulse-electrodeposited method. Gold(III) chloride and Hexachloroplatinate(IV) was used as the precursors providing the metal ion in electrochemical reduction to produce the metals clusters on the carbon substrates at given potentials and the Pt/C, Au/C, or AuPt/C were prepared. The nanoparticles sizes and distribution on the substrates were observed by using the scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). Prepared Pt/C, Au/C and Au-Pt alloy by co-electrodeposition method on carbon substrate was characterized by using cyclic voltammetry and the methanol electrochemical oxidation reactions in alkaline electrolyte were checked. The study result showed reduction of partical size and the pulse time linear growth, as had the greater potential of the higher current density, the more number of nucleation and the formation of smaller particles. The result of carbon monoxide (CO) and methanol (CH3OH) oxidation found that carbon monoxide (CO) and methanol oxidation potential in alkaline system are lower than the acid. In alkaline system the methanol oxidation current are higher than the acid, the ability of electrocatalyst is better in alkaline.

Project ID:PB10007-7231
External Project ID:NSC100-2221-E182-064-MY2