Impedance investigation of the charge transport in film-modified electrodes - Sorbonne Université Access content directly
Journal Articles Journal of electroanalytical chemistry and interfacial electrochemistry Year : 1991

Impedance investigation of the charge transport in film-modified electrodes

Abstract

Two kinetic models which can explain the coupling between electrochemical charge transfer and the charge transport in polymer films of film-modified electrodes are analyzed. The first one is based on a diffusion-like process due to the mutual electron exchange between adjacent redox centers. The second one assumes a finite conductivity of the film. The electrochemical impedances characteristic of the models have been derived and also simulated numerically. Some experimental impedance measurements which were obtained from a glassy-carbon electrode modified with a redox-polymer film are reported and discussed in terms of these two models. The influence of film inhomogeneities on the impedance characteristics is also discussed.

Dates and versions

hal-04557918 , version 1 (24-04-2024)

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Claude Gabrielli, Hisasi Takenouti, O. Haas, A. Tsukada. Impedance investigation of the charge transport in film-modified electrodes. Journal of electroanalytical chemistry and interfacial electrochemistry, 1991, 302 (1-2), pp.59-89. ⟨10.1016/0022-0728(91)85032-K⟩. ⟨hal-04557918⟩
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