REVERSIBLE OXYGEN ELECTRODES.
Abstract
Achievements during the course of the Project have been briefly summarized. A rotating disk electrode with a concentric ring was shown to be a valuable tool in discriminating between possible mechanisms in 02 reduction. On platinum electrodes in highly purified acid solutions the reduction is a 4-electron process until the electrode potential below 0.1 V with respect to N.H.E., when H202 starts forming. At 0.00 V, nearly all current is due to H202 formation. In not highly purified solutions, the current on the disk shows a maximum which is less than the limiting current, and then with the potentials becoming more cathodic, current decreases. This deactivation is due to the adsorption of the impurities, and the correlation between the shape of the oxygen reduction curve and an adsorption isotherm is apparent. In alkaline solution H202 is an intermediate. Possible mechanisms for 02 reduction are discussed for both acid and alkaline media. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1964
- Accession Number
- AD0616779
Entities
People
- A. Damjanovic
- M. Genshaw
- V. Brusic
Organizations
- University of Pennsylvania