Diffusion of redox active molecules in deep eutectic solvents

Stéphanie Fryars 1 Emmanuelle Limanton 1 Fabienne Gauffre 1 Ludovic Paquin 1 Corinne Lagrost 1 Philippe Hapiot 1
1 ISCR - Institut des Sciences Chimiques de Rennes
Abstract : Classical electrochemical approaches were evaluated for investigating the basic properties of deep eutectic solvents (DES) with a special focus on the mass transport phenomena and diffusion of charged species in DES. Three classical DES were considered: Reline, Ethaline and choline chloride-lactic acid mixture. Cyclic voltammetries of the ferrocene oxidation and of the ferricyanide reduction, respectively with charge 0 and − 3, exhibit well-defined responses in these media. For all considered DES and redox molecules, diffusion processes govern the mass-transport of the redox molecules from the solution to the electrode. Derived diffusion coefficients were extracted and found to present some inconsistencies with the classical Stokes-Einstein law for homogeneous media. The diffusion coefficients were found to be almost unaffected by the charge present on the diffusing molecules contrarily to observations made for ionic liquids.
Keywords : Cyclic voltammetry Redox probes Deep eutectic solvents Diffusion coefficients
Type de document :
Article dans une revue
Journal of Electroanalytical Chemistry, Elsevier 2018, 819, pp.214-219. 〈10.1016/j.jelechem.2017.10.030〉
Domaine :
Liste complète des métadonnées
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01812103
Contributeur : Laurent Jonchère <>
Soumis le : lundi 11 juin 2018 - 11:24:57
Dernière modification le : dimanche 23 décembre 2018 - 19:04:37
Document(s) archivé(s) le : mercredi 12 septembre 2018 - 23:16:16

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SCR_MACSE | INC-CNRS | ISCR | UNIV-RENNES | UR1-UFR-SPM | ISCR-CORINT | INSA-RENNES

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Stéphanie Fryars, Emmanuelle Limanton, Fabienne Gauffre, Ludovic Paquin, Corinne Lagrost, et al.. Diffusion of redox active molecules in deep eutectic solvents. Journal of Electroanalytical Chemistry, Elsevier 2018, 819, pp.214-219. 〈10.1016/j.jelechem.2017.10.030〉. 〈hal-01812103〉

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