Abstract
The electrochemical (COOH) 2 oxidation reaction was studied at high potentials (i.e. in the region where O 2 is evolved) in acidic, aqueous solutions using conductive WO x based anodes. The WO x films used as anodes also contained Pt ‘micro’-centers. Comparative oxidation studies were also carried out using antimony doped SnO 2 anodes. More rapid (COOH) 2 oxidation rates were observed for the WO x based anodes than for the antimony doped SnO 2 anodes. The (COOH) 2 oxidation reaction studied under the conditions used in this work was shown to be activation rather than mass transport controlled. The (COOH) 2 oxidation rate constant was found to be independent of the applied potential using the WO x based anodes. This likely suggests that a chemical reaction is involved in the (COOH) 2 oxidation reaction. This chemical reaction is also suggested to be the rate determining step in the (COOH) 2 to CO 2 oxidation reaction. Furthermore, it is believed that the (COOH) 2 oxidation reaction involves adsorptive interactions of this organic with the Pt/WO x anode surface.
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