Document Type

Article

Date

7-25-1983

Embargo Period

4-25-2013

Keywords

Chemistry

Disciplines

Chemistry

Description/Abstract

A quantum mechanical treatment of the conduction electrons of a metal in a polarisable interface shows that they can make an appreciable contribution to the electrical capacitance. Results for six metals are given, showing how differences in metal properties account qualitatively for experimentally observed differences in interfacial capacities, when the solvent is replaced by a dielectric film. To justify the neglect of solvent structure when metal properties are treated, the coupling between metal and solvent is discussed for orientable point solvent dipoles, and for a representation of the solvent polarisation by a pair of charged planes. The electron profile affects the polarisation of the solvent near the point of zero charge, but the solvent structure has an almost negligible effect on the metal contribution to the capacity. One parameter in our model, the distance from metal ions to the first solvent layer, can be expected to vary as the interface is charged, due to changed bonding. Coupling by such an effect can be quite important, and severely decreases the variation of metal capacity with charge.

Additional Information

Copyright 1983 Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. This article may be downloaded for personal use only. Any other use requires prior permission of the author and Journal of Electroanalytical Chemistry and Interfacial Electrochemistry.

The article may be found at http://www.sciencedirect.com/science/article/pii/S0022072883801867

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Creative Commons License

Creative Commons Attribution 3.0 License
This work is licensed under a Creative Commons Attribution 3.0 License.

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