Abstract
Abstract In situ optical second harmonic generation(SHG) technique was employed to investigate the electrochemical oxidation of formaldehyde on a polycrystalline Pt electrode. At 532 nm excitation, the SH signal generated at a Pt surface seems to be enhanced by the existence of adsorbed CO and can be related to the surface coverage of CO(a) which cannot be determined by the electrochemical methods. Thus, the potential dependence of the SH signal provides useful information to understand the mechanism of this reaction.
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