Izvorni znanstveni članak

Experimental Conditions for the Electrochemical Activation of an Electrodeposited Ruthenium Electrode

Marijan Vuković ; Laboratory of Electrochemistry and Surface Phenomena, Ruder Bošković Institute, Zagreb, Croatia, Yugoslavia

Sažetak

Several types of electrodeposited ruthenium electrodes on a platinum substrate have been studied. The first type was prepared by a galvanostatic deposition using 40 mA cm-2 current density and varying deposition time from 1 to 60 min. A porous layer was obtained which exhibited passive behaviour during potentiodynamic polarization at positive potentials before commencement of the oxygen evolution reaction. This layer has been electrochemically activated to a second type of electrode by square wave pulses between -0.2 and + 0.85 V vs. SCE. The complete reduction of the oxide is a necessary condition for the activation process. A potentiostatic electrodeposition and a galvanostatic electrodeposition using low current density and short deposition time produced electrodes whose voltammetric behaviour was similar to a bulk ruthenium electrode in acid solution.

Ključne riječi

Hrčak ID:

137351

URI

https://hrcak.srce.hr/137351

Datum izdavanja:

15.10.1991.

Posjeta: 884 *