Electrochemical oxidation of methanol on Pt3Co bulk alloy
Electrochemical oxidation of methanol on Pt3Co bulk alloy
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DOI：
10.2298/jsc0311859g
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发表时间：
2003-01-01
影响因子：
1
通讯作者：
Gojkovic, SL
中科院分区：
文献类型：
--
作者：
Gojkovic, SL
研究了 Pt3Co 合金中甲醇的电化学氧化。在酸性溶液中。动力学参数，例如传递系数。确定了关于甲醇和H+离子的反应级数和活化能。发现通过电极的旋转，甲醇氧化的速率显着降低。这种效应归因于甲醛中间甲酸从电极表面的扩散。电解质的搅拌也影响反应的动力学参数。据推测，静态和搅拌电解质中的主要反应途径和速率确定步骤是不同的。相对于纯 Pt 表面，钴对 Pt3Co 合金块上的甲醇氧化速率没有表现出促进作用。
The electrochemical oxidation of methanol was investigated oil a Pt3Co bulk alloy. in acid solutions. Kinetic parameters such as transfer coefficient. reaction orders with respect to methanol and H+ ions and energy of activation were determined. It was found that the rate of methanol oxidation is significantly diminished by rotation of the electrode. This effect was attributed to die diffusion of formaldehyde mid formic acid from the electrode surface. Stirring of the electrolyte also influenced the kinetic parameters of the reaction. It was speculated that the predominant reaction pathway and rate determining step are different in the quiescent and in die stirred electrolyte. Cobalt did not show a promoting effect on the rate of methanol oxidation on the Pt3Co bulk alloy with respect to a pure Pt surface.