Abstract
Potential-modulated reflection-absorption infrared spectroscopy has been utilized to study, in-situ, the nature of strongly adsorbed species formed by oxidation of formaldehyde on palladium, platinum and rhodium electrodes in acidic media. The infrared spectra obtained are consistent with a significant presence of electrosorbed CO, in a variety of coordination modes, on electrode surfaces. The frequency and intensity of the observed infrared features are in good agreement with those obtained upon electrosorption of CO on the same substrates from the solution saturated with gaseous carbon monoxide.
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