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The kinetics of the bromine electrode in a silver bromide-sodium bromide melt

✍ Scribed by R. Tunold; A. Vatland

Publisher: Elsevier Science
Year: 1974
Tongue: English
Weight: 535 KB
Volume: 19
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(74)87011-8

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✦ Synopsis

Kinetic parameters for the bromine evolution reaction on graphite and carbon electrodes in a silver bromide/sodium bromide melt have been determined at 750°C. Double pulse measurements show that the charge transfer reaction is fast with an exchange cd in the range of l-3A/cm2. Tafel slopes obtained from steady state cd/potential measurements show that the desorption of adsorbed bromine atoms is probably the rate controlling step of the electrode reaction. The adsorption then probably follows a Temkin-type isotherm.

Critical oarameters for the anode effect have been determined. The critical cd was found to be especially I& on polished graphite surfaces.

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