Faculty of Technology and Metallurgy
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Item type:Publication, Thin Layers of Polyaniline/TiO2 Nano-particles Using Electrochemical Deposition(World Scientific and Engineering Academy and Society Press, 2007); Arsov, LjubomirBy cycling voltammetry the thin layers of polyaniline on mechanically polished Nb electrode from sulfuric aqueous solutions with aniline added were deposited. During the repetitive voltammetric scans, by simultaneous in-situ Raman spectroscopical measurements, the redox reactions and formation of degradation production in polymer film were investigated. It was found that the new monitored voltammetric waves appear only when the polyaniline reaches an over-oxidized state. The comparative measurements on Pt electrode in sulfuric aqueous solutions with aniline and TiO2 nano-particles added were also performed. It was shown that the TiO2 nano-particles inhibits the formation of degradation products. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electrochemical behavior of tantalum in potassium hydroxide solutions(International Association of Physical Chemists (IAPC), 2018-08-31)The electrochemical behavior of tantalum in various concentrations of KOH solutions (0.1 M -10 M), was investigated using the evolution of the open circuit potentialin time, cyclic voltammetry and ellipsometricmeasurements. Depending on KOH concentrations, the open circuit potential measurements have shown three distinct behaviors concerning oxide film formation on the electrode surface and its dissolution. The cyclic voltammetry measurements were performed in various potential ranges, from -1.4 to 8 V, different concentrations of KOH solutions (0.110 M) and sweep rates ranging from 0.005 V/s to 1 V/s. In the passive region, very stable passive films were formed, which reduction has not been possible during cathodic polarization even at highly concentrated KOH solutions. In the trans-passive region, the very strong peak at 1.65 V was monitored, which nature and chemical composition is still not well known.