Dynamics of double-layer by AC Modulation of the Interfacial Capacitance and Associated Transfer Functions
✍ Scribed by E.R. Larios-Durán; R. Antaño-López; M. Keddam; Y. Meas; H. Takenouti; V. Vivier
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 966 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
The Modulation of Interface Capacitance Transfer Function (MICTF) technique in combination with Electrochemical Impedance Spectroscopy (EIS) and derived transfer functions has been developed for the study of double-layer relaxation and adsorption processes. Using a Hg electrode in NaBr and KCl solutions as examples, the MICTF is shown to be well-suited for the investigation of physico-chemical processes occurring inside the diffuse layer. Two time-constants are found and their characteristics are analyzed as a function of the potential of zero charge (PZC), the electrolyte concentration, and the nature of the electrolyte. Interpretation is discussed in the framework of accepted double-layer theories including relaxation in the diffuse double-layer and adsorption processes.