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Oxygen overvoltage on PtRh alloy electrodes

✍ Scribed by J.P. Hoare


Publisher
Elsevier Science
Year
1969
Tongue
English
Weight
822 KB
Volume
14
Category
Article
ISSN
0013-4686

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✦ Synopsis


Ahstraet-Oxygen overvoltage measurements were carried out on a series of Pt-Rb alloy electrodes in 2 N H,SO, solutions under conditions of both constant current and constant potential. The effect of electronic structure of the electrode material was detected on the rest potential and the kinetics of the cathodic reduction of oxygen but not on the anodic evolution of oxygen. The electronic structure affects the electrode kinetics through oxygen or anion adsorption.

R&rum&-On a mesure la surtension d'oxyg&ne sur une s&e d'electrodes faites d'alhages de Pt et Rh dam des solutions 2 N en H$O, B courant constant ainsi qu'a potentiel constant. On a observe l'effet de la structure &ctronique du mat&au d%lectrode sur le potentiel au repos et sur la cinetique de la reduction cathodique de l'oxygene, mais pas sur le degagement anodique de l'oxy e. La structure electronique affecte la cinetique d'electrode par l'intermediaire de l'adsorption de Pn 'oxyg&ne ou celle de l'anion.

Zusamme&aamR-Die

Sauerstoff%erspannung wurde an einer Reihe von Pt-Rh-Legienmgselektroden in 2 N H,SO,-L&ungen sowohl bei konstanter Spannung als such mit konstantem Strom gemessen. Em Eintlul3 der elektronischen Struktur des Elektrodemnetalls auf das Ruhepotential und die Kinetik der katodischen Sauerstoff-Reduktion, aber nicht auf die anodische Sauerstoff-Rntwickhmg wurde festgestellt. Die elektronische Struktur beeinfluht die Elektroden-Kinetik durch Sauerstoff oder Anionen-Adsorption.


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