The anodic oxidation of oxalic acid on Au has been studied at 80°C in aqueous media. The reaction rate was measured as a function of potential, oxalic acid concentration, pH, and temperature in H2SO4+ K2SO4+ KOH solutions of unit ionic strength. The oxalic acid was oxidized in acidic media to CO2. A first-order dependence of the rate on both pH and undissociated oxalic acid was found. The first decarboxylation step appears to be rate determining.
J. W. Johnson, S. C. Mueller and W. J. James, Trans. Faraday Soc., 1971, 67, 2167 DOI: 10.1039/TF9716702167
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