Elsevier

Electrochimica Acta

Volume 23, Issue 5, May 1978, Pages 419-424
Electrochimica Acta

Oxidation of L-ascorbic acid on a gold electrode

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Abstract

Voltagrams of L-ascorbic acid on a gold electrode show the existence of two oxidation waves but no reduction wave. An analysis of the I—E curves was carried out together with the Tafel slopes and reaction orders. The products from the first oxidation were identified by paper chromatography.

A scheme is proposed for the overall reaction of the first oxidation together with a reaction mechanism at potentials corresponding to the foot of the wave.

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Present Address: Departamento de Electroquímica, Facultad de Ciencias, Universidad Autónoma, Canto Blanco, Madrid 34.

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