Skip to Main content Skip to Navigation
Journal articles

Theory of charge asymmetric electrolytes. Onsager’s approach revisited

Abstract : Onsager made corrections to the Poisson-Boltzmann equation, to more correctly describe interactions in asymmetric electrolytes (those which have different charges, in absolute value, for the cation and the anion). The equations established by Onsager allow the calculation of symmetric total correlation functions, such that h ij (r) = h ji (r). In this article it has been shown that these correlation functions, describing in particular asymmetric electrolytes, can also be deduced from the Ornstein Zernicke integral equations by considering a nonlinear closure relation of the HNC type. The excess free energy deduced from these correlation functions has been found similar to that obtained in Mayer's theory. Relations with the electrostatic association models on the one hand, and with the dressed ions theory on the other hand, are recovered.
Document type :
Journal articles
Complete list of metadata

https://hal.sorbonne-universite.fr/hal-03775315
Contributor : Olivier Bernard Connect in order to contact the contributor
Submitted on : Monday, September 12, 2022 - 2:29:36 PM
Last modification on : Thursday, September 22, 2022 - 5:10:51 AM

File

Bernard-JML22-revised.pdf
Files produced by the author(s)

Identifiers

Citation

O. Bernard. Theory of charge asymmetric electrolytes. Onsager’s approach revisited. Journal of Molecular Liquids, Elsevier, 2022, 366, pp.120163. ⟨10.1016/j.molliq.2022.120163⟩. ⟨hal-03775315⟩

Share

Metrics

Record views

0

Files downloads

0