Simulation of ion mass transfer processes with allowance for the concentration dependence of diffusion coefficients

Autor:	S. A. Lilin, V. I. Parfenyuk, A. V. Noskov
Rok vydání:	2006
Předmět:	Physics::Plasma Physics Chemistry Diffusion Mass transfer Limiting current Analytical chemistry Thermodynamics Allowance (engineering) General Chemistry Electrolyte Ion transporter Anode Ion
Zdroj:	Russian Chemical Bulletin. 55:661-665
ISSN:	1573-9171 1066-5285
DOI:	10.1007/s11172-006-0309-9
Popis:	The system of equations describing ion transport in a binary electrolyte za-zc with allowance for the linear dependence of the diffusion coefficients on the concentration was analyzed in the framework of the phenomenological Nernst-Planck approach. The expressions are obtained that define concentration profiles of ions and conditions favorable for the limiting current caused by the achievement of the concentration of a saturated solution (in the case of the anodic reaction) and depletion of the near-electrode region in electroactive cations (in the case of the cathodic reaction). The revealed theoretical dependence of the limiting current on the volume concentration of the salt agrees with published experimental data. The voltammetric characteristics of the corresponding systems were calculated. The role of the migrational component of the ion flow is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::271c5366df8c1ea449e5b14c792b06fd https://doi.org/10.1007/s11172-006-0309-9 Zobrazit plný text záznamu Full text from SpringerLink