Abstract
Electrochemical properties of a thin-film nanocomposite “silicon-carbon matrix-tungsten carbide” deposited onto pyroceramics (“sitall”) substrate are studied by potentiodynamic curves and electrochemical impedance spectroscopy. Transfer coefficients in model redox system [Fe(CN)6]3−/4− are measured. With the decreasing of the films’ electrical resistance, their experiment behavior gradually changed from that of “poor conductor” till nearly metal-like one. In particular, the electrode differential capacitance increases, which is explained by the increase in the number of conducting metal-containing clusters in the film bulk and at the film/electrolyte solution interface. Some specific features of the complex-plane plots of impedance spectra are tentatively explained by the adsorption at the nanocomposite surface elements.
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Original Russian Text © M.D. Krotova, Yu.V. Pleskov, V.V. Elkin, A.D. Bozhko, M.L. Shupegin, 2009, published in Elektrokhimiya, 2009, Vol. 45, No. 1, pp. 99–106
The paper is dedicated to the Centenary of B.V. Ershler.
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Krotova, M.D., Pleskov, Y.V., Elkin, V.V. et al. Electrochemical behavior of tungsten-containing nanocomposite with siloxane matrix. Russ J Electrochem 45, 93–100 (2009). https://doi.org/10.1134/S1023193509010133
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DOI: https://doi.org/10.1134/S1023193509010133