Abstract
Methanol has been the subject of many studies in the last decade within the possible fuels for the fuel cell technology. As known the methanol electro-oxidation pathway on platinum follows by formation of formic acid, carbon monoxide and finally carbon dioxide and water. In this work it is shown the influence of structural effect on platinum electrodes for the electro-oxidation of CO and methanol. Moreover, it is shown the effect of the CO adsorption on platinum on methanol electro-oxidation. Methanol electro-oxidation follows a different sequence of the potential dependence depending on surface orientation. The highest potential for CO electro-oxidation was observed on Pt(111) followed by Pt(100), and Pt(110). There are two groups of platinum surfaces for methanol electro-oxidation: self-cleaning, and self-poisoning. Self-cleaning reduce the potential of the COads electro-oxidation whereas self-poisoning increase the potential of the COads electro-oxidation.
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