ac impedance and electrochemical noise of strongly adsorbed electroactive species. Application to a redox polymer modified electrode
✍ Scribed by C. Gabrielli; F. Huet; M. Keddam; O. Haas
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 733 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
A model of the deterministic and stochastic behaviour of electrode-electrolyte interface where electroactive species are strongly adsorbed is presented. It leads to the current-voltage curve, the electrochemical impedance and the electrochemical noise. An experimental study of an electrode coated with a thin film of redox polymer shows a good agreement between the model predictions and the experimental data, and leads to an experimental confirmation of the Fluctuation-Dissipation theorem (Nyquist theorem) for this system at thermodynamic equilibrium. The kinetic parameters are deduced from the impedance.