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The influence of an adsorption process on the oxidation of oxalic acid on a gold electrode has been analysed. To disclose this influence, different supporting electrolytes have been used with different adsorption of the anion (SO42-, NO3- and ClO4-). Moreover, it has been studied the modifications produced in the oxidation process by the presence of some species in solution with a strong adsorption (halides), but at low concentration levels.

The electrochemical reduction of mesoxalic acid on polycristalline platinum surfaces has been studied in acid medium. The reaction proceeds through the interaction with adsorbed hydrogen atoms. Malonic acid is proposed as final reaction product.