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Oxygen reduction at silver electrodes in alkaline solutions

✍ Scribed by D. Šepa; M. Vojnovíc; A. Damjanovic


Publisher
Elsevier Science
Year
1970
Tongue
English
Weight
954 KB
Volume
15
Category
Article
ISSN
0013-4686

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✦ Synopsis


Oxygen reduction has been studied at silver electrodes in alkaline solutions. &e-treatment of the electrodes significantly affects the kinetics of the reduction. At the pre-reduced electrodes, the rate-determining step at high cds is the first discharge step. At low cds, the rate-determining step changes and a chemical step which follows a charge-transfer step becomes the rate determining. At the electrodes not prereduced, the thirst discharge step is rate-determining. dissociated before the rate-determining step. Oxygen molecule is not R-&Etude de la @duction de l'oxygcne aux clectrodea d'argent en solutions alcalines. Un prC-traitement des blectrodes affecte notablement les cinbtiques de la r8duction. Aux t5lectrodes pr&&luites, pour des den&b de courant blev&s, 1'6tape r@ulatrice de la vitesse est la premi&re d&&arge. Pour de faibles den&&s de courant, c'est la phase chimique qui suit le transfert de charge qui devient rkgulatrice de la vitesse. Aux &ctrodes non pr6-r&h&es, la premi&re deCharge est r&ulatrice. La mol&cule d'oxyg&ne n'est pas dissoci&e avant P&ape rbgulatrice. Zusammenfassung-Die Reduktion von Sauerstoff an Silberelektroden in a&al&her L&sung wurde untersucht. Die Vorbehandlung der Elektroden beeinflusst die Klnetik der Reduktion in eindeutiger We&.

Sind die Elektroden vorher reduziert worden, so ist bei hohen Stromdichten der erste Entladungsschritt geschwindigkeitsbestimmend.

Rei


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