✦ LIBER ✦

The anodic evolution of oxygen on platinum oxide electrode in alkaline solutions

✍ Scribed by C. Iwakura; K. Fukuda; H. Tamura

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 730 KB
Volume: 21
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(76)85139-0

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✦ Synopsis

The anodic evolution of oxygen was investigated on the platinum oxide electrode, prepared by a thermal decomposition method, in alkaline solutions; the overvoltage data were reproducible on this electrode. On the basis of reliable mechanistic observations, the most probable path under Langmuir conditions was proposed, which is the same as that suggested by Krasil'shchikov for a nickel electrode in alkaline solution. The rate-determining step changes from the 2nd to the 1st step, depending on the overpotentials. This was also supported by the corresponding change in the values of activation energy. The similarity of this platinum oxide to oxide films produced by prolonged anodization of platinum in the anodic polarization characteristics was suggested.

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