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Comment on “On the ‘simple check’ of electrocapillarity” by AY Gokhshtein

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Abstract

It is shown that the so-called “equation of solid-state electrocapillarity” derived by Gokhshtein from the simplest thermodynamic model, earlier used by Lippmann, is an incorrect modification that is returned to the classic Lippmann equation if to take into account the usual definition of differential capacity of the electrical double layer. Consequently, Gokhshtein’s experiments can actually confirm only the validity of the Lippmann equation (with deviations caused by physicochemical processes in the double layer, which could not be taken into account in the thermodynamic equations). The thermodynamic model is insufficient for the interpretations of these experimental results, whose understanding requires physical models of the different phenomena occurring at the electrode surface.

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Acknowledgments

The author likes to thank Prof. S. Fletcher for the fruitful discussions and recommendations.

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Correspondence to Emmanuel M. Gutman.

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Gutman, E.M. Comment on “On the ‘simple check’ of electrocapillarity” by AY Gokhshtein. J Solid State Electrochem 18, 2061–2069 (2014). https://doi.org/10.1007/s10008-014-2433-z

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  • DOI: https://doi.org/10.1007/s10008-014-2433-z

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