Original scientific paper

Electrochemical Investigation of an Electrodeposited and Thermally Treated Ruthenium Electrode in Alkaline Solution*

Marijan Vuković ; Laboratory of Electrochemistry and Surface Phenomena, Rudjer Bošković Institute, Zagreb, Croatia, Yugoslavia
Dunja Čukman ; Laboratory of Electrochemistry and Surface Phenomena, Rudjer Bošković Institute, Zagreb, Croatia, Yugoslavia

Abstract

The oxygen evolution reaction has been studied on ruthenium
electrodeposited on a titanium substrate in 1 mol dm-3 sodium
hydroxide solution. A Tafel slope of 40 mV per deeade was obtained,
but the electrode dissolved under anodic polarization. Thermal
treatment of the bare ruthenium electrode at 450aC in air stabilized
the electrode surface. The service life test within four
days did not show any dissolution of the electrode layer. Anodic
oxidation of the electrode treated at 250ce has shown the presence
of a duplex oxide film, hydrous at the outer layer of the
electrode and more compact closer to the titanium surface. Impedance measurements in the frequency range from 0.1 Hz-20
kHz show two parallel processes on the electrode surface.

Keywords

Hrčak ID:

175816

URI

https://hrcak.srce.hr/175816

Publication date:

10.10.1989.

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