Abstract
Ethanol oxidation on Pt–Os and Pt–Ru–Os alloy electrodes was investigated by electrochemical and spectroelectrochemical techniques. Cyclic voltammetry and chronoamperometric results showed that the Pt–Os alloy has the highest current density at lower potentials. Linear COads, acetic acid, acetaldehyde, and CO2 were identified as reaction intermediates and/or products by single potential alteration infrared reflectance spectroscopy and subtractively normalized interfacial Fourier transform infrared reflectance spectroscopy techniques. The in situ Fourier transform infrared spectroscopy results showed that the electrooxidative adsorption of ethanol was dissociative providing COads at low potentials.
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