Study of the double layer at the Hg/aqueous KCl interface at high temperatures

The differential capacity-potential relations for the mercury electrode in diluted aqueous KCl solutions at the temperatures from ambient to 300°C were obtained. The values of zero charge potential of mercury at different temperatures were derived as the potential of the capacitance minimum. It was...

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Bibliographic Details
Published in:Electrochimica acta 1993-09, Vol.38 (13), p.1761-1768
Main Authors: Kriksunov, L.B., Semenikhin, O.A., Bunakova, L.V.
Format: Article
Language:English
Subjects:
charge of mercury electrode
differential capacity
Helmholtz layer
high temperatures
potential of zero charge
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Summary:The differential capacity-potential relations for the mercury electrode in diluted aqueous KCl solutions at the temperatures from ambient to 300°C were obtained. The values of zero charge potential of mercury at different temperatures were derived as the potential of the capacitance minimum. It was found that the pzc values, not corrected for the thermodiffusion potential drop, shift towards more positive potentials with the rise in temperature. The integral capacity and the charge of the electrode were calculated. Temperature dependencies of these parameters and also of the capacity of the Helmholtz layer are discussed. The ψ-potential values are calculated by Gouy-Chapman theory.
ISSN:0013-4686
1873-3859
DOI:10.1016/0013-4686(93)85074-9