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Electro-oxidation at a coated iridium electrode

✍ Scribed by M.M. Hefny; S. Abdel-Wanees

Book ID
103067685
Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
397 KB
Volume
41
Category
Article
ISSN
0013-4686

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✦ Synopsis

The electro-oxidation of methanol was studied in acid media at iridium electrodes modified by the electrochemical deposition of hydrated iridium oxide. This oxide was grown by the repetitive cyclic polarization technique. The influence of methanol concentration, solution composition and temperature, and the number of the cycles applied to form the oxide on the oxidation current density have been studied voltammetrically.

This electrode behaves as an electrocatalyst for the electro-oxidation of methanol. The mechanism of oxidation is likely to be dissociative chemisorption involving one electron transfer. The rate constant for the oxidation of methanol is 3.5 x lO_smol s-l cm-* at 1.2OV vs see.

πŸ“œ SIMILAR VOLUMES

Electro-oxidation of formic acid on the
Electro-oxidation of formic acid on the iridium electrode as a function of pH
✍ J.E. Ferrer; Ll. Victori πŸ“‚ Article πŸ“… 1993 πŸ› Elsevier Science 🌐 English βš– 610 KB

The behavior of the Ir electrode in formic acid solutions of different pH values was studied by cyclic voltammetry. The pH range was 1.6-12. Three different pH zones were observed: in the range 1.6-6 the intensity of formic acid oxidation increases with increasing pH; in the range 6-7, the intensity