Connection of CVs and impedance spectra of reversible redox systems, as used for the validation of a dynamic electrochemical impedance spectrum measurement system

Pajkossy, Tamás and Mészáros, Gábor (2020) Connection of CVs and impedance spectra of reversible redox systems, as used for the validation of a dynamic electrochemical impedance spectrum measurement system. Journal of Solid State Electrochemistry. ISSN 1432-8488 (print version), 1433-0768 (electronic version)

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Abstract

With the purpose of fast characterization of electrode reactions, a dynamic electrochemical impedance spectrum (dEIS) measurement system has been assembled which permits the continuous collection of audio-frequency impedance spectra while performing cyclic voltammetry measurements with the usual scan-rates up to 200 mV/s. The performance of this system was tested by analyzing the CV curves and impedance spectra taken simultaneously in ferro/ferricyanide containing aqueous solutions yielding an experimental demonstration of the connection of the semiintegrated reversible voltammograms and the Warburg coefficients.

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