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Title
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Electrodeposition ofPt nanoparticles on modified electrodes with metal oxide and investigation of their performance in oxidation of Methanol
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Type
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Presentation
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Keywords
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Pt nanoparticles, Electrodeposition method, Methanol oxidation, Support materials
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Abstract
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Catalyst support materials exhibit great influence on the cost, catalyst activity, and durability of direct alcohol fuel cells, in this research electrodes were prepared from metal oxides (Sn02 and Sb doped S11O2) on titanium substrate (Ti) as a new support meterial for Pt catalyst in order to electro-oxidation of methanol. platinum nanoparticles were deposited on metal oxide film that was deposited on the Ti electrode via electro reduction of platinum salt in an acidic solution. The Physical morphology of modified electrodes was evaluated by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX) techniques. The electrocatalytic behaviour of this type of electrodes for methanol oxidation reaction (MOR) and oxidation of carbon monoxide (CO) absorbed on Pt was considered with cyclic voltammetry and electrochemical impedance spectroscopy of catalyst in 0.5 mol L"1 H2SO4 aqueous solution. The results of the electrochemical analysis reveal that Pt/Sb-SnCh/Ti has a high catalytic activity for oxidation of methanol and CO absorbed on Pt. Electrochemical surface area (ECSA) of a platinum electrocatalyst is measured by cyclic voltammetry in 0.5 mol L"1 H2SO4 aqueous solution.. The doping of S11O2 with Sb improves ECSA and MOR activity, which act as electronic donors to increase electronic conductivity.
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Researchers
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Zohre Merati (Second Researcher), Jalal Basiri Parsa (First Researcher)
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