Properties of the diffuse double layer at high electrolyte concentrations

W Ronald Fawcett; Peter J Ryan; Thomas G Smagala

doi:10.1021/jp9058577

Properties of the diffuse double layer at high electrolyte concentrations

J Phys Chem B. 2009 Oct 29;113(43):14310-4. doi: 10.1021/jp9058577.

Authors

W Ronald Fawcett¹, Peter J Ryan, Thomas G Smagala

Affiliation

¹ Department of Chemistry, University of California, Davis, California 95616, USA.

PMID: 19845407
DOI: 10.1021/jp9058577

Abstract

The equations necessary to calculate the potential drop across the diffuse layer and its differential capacity are derived for 1:1 electrolytes on the basis of the Eigen and Wicke theory for concentrated electrolyte solutions. The results of this model are then compared with Monte Carlo data for more concentrated solutions and solutions with ions of large diameters. It is shown that the Eigen-Wicke model is inadequate because it fails to consider the change in potential at a given ion due to its surrounding atmosphere.