The role of the concentration profile of titanium oxide on the electrochemical behavior of RuO2-TiO2 coatings obtained by the sol-gel procedure
In order to understand the role of TiO2 in the deactivation mechanism of an active RuO2–TiO2 coating, an additional TiO2 layer was introduced in the support coating interphase of regular Ti//[RuO2–TiO2 anode in one case and on the surface of the coating in the other. The electrochemical behavior of...
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2003-01-01
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doaj-f24b7fc072da42ea9e999e2a4544fdbf2020-12-24T12:17:45ZengSerbian Chemical Society Journal of the Serbian Chemical Society0352-51391820-74212003-01-01681297998810.2298/JSC0312979P0352-51390312979PThe role of the concentration profile of titanium oxide on the electrochemical behavior of RuO2-TiO2 coatings obtained by the sol-gel procedurePanić Vladimir V.0Dekanski Aleksandar B.1Mišković-Stanković Vesna B.2Milonjić Slobodan K.3Nikolić Branislav Ž.4ICTM-Center of Electrochemistry, University of Belgrade, Njegoševa 12, P.O. Box 473, 11001 BelgradeICTM-Center of Electrochemistry, University of Belgrade, Njegoševa 12, P.O. Box 473, 11001 BelgradeFaculty of Technology and Metallurgy, University of Belgrade, BelgradeVinča Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia and MontenegroFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, P.O. Box 3503, 11120 BelgradeIn order to understand the role of TiO2 in the deactivation mechanism of an active RuO2–TiO2 coating, an additional TiO2 layer was introduced in the support coating interphase of regular Ti//[RuO2–TiO2 anode in one case and on the surface of the coating in the other. The electrochemical behavior of these, with TiO2 enriched, anodes was compared with the behavior of anodes with regular RuO2–TiO2 coatings, which were subjected to an accelerated stability test. A high-frequency semicircle in the complex plane plot obtained by electrochemical impedance spectroscopy, for a regular RuO2–TiO2 coating corresponds to TiO2 enrichment in the coating as a consequence of anode corrosion. In the case of the coatings with additional TiO2 layers, a high-frequency semicircle was not observed. The additional TiO2 layers increase the coating overall resistance and influence the coating impedance behavior at low frequencies. Similar equivalent electrical circuits were used to analyze the impedance behavior of coatings having an additional TiO2 layer at different position within RuO2–TiO2 coating.http://www.doiserbia.nb.rs/img/doi/0352-5139/2003/0352-51390312979P.pdfruo2–tio2 coatingcorrosion stabilityoxide solssol-gel procedureelectro-chemical impedance spectroscopy |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Panić Vladimir V. Dekanski Aleksandar B. Mišković-Stanković Vesna B. Milonjić Slobodan K. Nikolić Branislav Ž. |
spellingShingle |
Panić Vladimir V. Dekanski Aleksandar B. Mišković-Stanković Vesna B. Milonjić Slobodan K. Nikolić Branislav Ž. The role of the concentration profile of titanium oxide on the electrochemical behavior of RuO2-TiO2 coatings obtained by the sol-gel procedure Journal of the Serbian Chemical Society ruo2–tio2 coating corrosion stability oxide sols sol-gel procedure electro-chemical impedance spectroscopy |
author_facet |
Panić Vladimir V. Dekanski Aleksandar B. Mišković-Stanković Vesna B. Milonjić Slobodan K. Nikolić Branislav Ž. |
author_sort |
Panić Vladimir V. |
title |
The role of the concentration profile of titanium oxide on the electrochemical behavior of RuO2-TiO2 coatings obtained by the sol-gel procedure |
title_short |
The role of the concentration profile of titanium oxide on the electrochemical behavior of RuO2-TiO2 coatings obtained by the sol-gel procedure |
title_full |
The role of the concentration profile of titanium oxide on the electrochemical behavior of RuO2-TiO2 coatings obtained by the sol-gel procedure |
title_fullStr |
The role of the concentration profile of titanium oxide on the electrochemical behavior of RuO2-TiO2 coatings obtained by the sol-gel procedure |
title_full_unstemmed |
The role of the concentration profile of titanium oxide on the electrochemical behavior of RuO2-TiO2 coatings obtained by the sol-gel procedure |
title_sort |
role of the concentration profile of titanium oxide on the electrochemical behavior of ruo2-tio2 coatings obtained by the sol-gel procedure |
publisher |
Serbian Chemical Society |
series |
Journal of the Serbian Chemical Society |
issn |
0352-5139 1820-7421 |
publishDate |
2003-01-01 |
description |
In order to understand the role of TiO2 in the deactivation mechanism of an active RuO2–TiO2 coating, an additional TiO2 layer was introduced in the support coating interphase of regular Ti//[RuO2–TiO2 anode in one case and on the surface of the coating in the other. The electrochemical behavior of these, with TiO2 enriched, anodes was compared with the behavior of anodes with regular RuO2–TiO2 coatings, which were subjected to an accelerated stability test. A high-frequency semicircle in the complex plane plot obtained by electrochemical impedance spectroscopy, for a regular RuO2–TiO2 coating corresponds to TiO2 enrichment in the coating as a consequence of anode corrosion. In the case of the coatings with additional TiO2 layers, a high-frequency semicircle was not observed. The additional TiO2 layers increase the coating overall resistance and influence the coating impedance behavior at low frequencies. Similar equivalent electrical circuits were used to analyze the impedance behavior of coatings having an additional TiO2 layer at different position within RuO2–TiO2 coating. |
topic |
ruo2–tio2 coating corrosion stability oxide sols sol-gel procedure electro-chemical impedance spectroscopy |
url |
http://www.doiserbia.nb.rs/img/doi/0352-5139/2003/0352-51390312979P.pdf |
work_keys_str_mv |
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