Effect of third metal on the electrocatalytic activity of PtRu/Vulcan for methanol electro-oxidation

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• 作者：Sivakumar Pasupathi and Vincenzo Tricoli
• 关键词：Methanol electro ; oxidation ; PtRu/Vulcan ; Ternary catalysts ; Catalytic activity
• 刊名：Journal of Solid State Electrochemistry
• 出版年：2008
• 出版时间：September, 2008
• 年：2008
• 卷：12
• 期：9
• 页码：1093-1100
• 全文大小：321.5 KB

文摘

The effect of a third metal on the activity of PtRu/Vulcan toward methanol oxidation reaction (MOR) is studied. An efficient method to prepare ternary catalysts was used, which allows the introduction of the third metal to PtRu/Vulcan without altering its particle size or dispersion. Ni, Mo, Co, and Ir were chosen and added to PtRu/Vulcan, based on theoretical and experimental literature results, anticipating enhancement in the catalytic activity of PtRu/Vulcan. The composition of the third metal can be varied from trace to considerable amounts. Transmission electron microscopy and energy-dispersive X-ray analysis were used to determine the particle size, dispersion, and the composition of the ternary catalysts. Cylic voltammetry, chronoamperometry, and CO-stripping voltammetry were used to analyze and compare the activities of the catalysts at 25 ¡ãC. It has been found that the addition of even trace amounts of third metal significantly affects the catalytic activity of PtRu toward MOR.