Electrochemical oxidation of a metal involving two successive charge transfer steps with adsorbed intermediate species. II—Theoretical expressions for electrochemical impedance spectra
✍ Scribed by S. Sanchez; G.S. Picard
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 749 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
The theoretical expression for the electrochemical impedance of anodic oxidation of a metal in which two successive charge transfer steps occur and involving two adsorbed species has been established. An equivalent electrical circuit has been given and the relationships between electrical and kinetic parameters were used for clearly discussing the dependence of the shapes of the impedance spectra upon potential and relative values of kinetic parameters. In particular, the appearance of an inductive effect or a negative polarization relativistic is strongly correlated with relative values of kinetic parameters and especially those of desorption steps.