✦ LIBER ✦

The Mn(II)/Mn(Hg) electrode reaction in dimethylsulphoxide (DMSO) and its mixtures with water

✍ Scribed by Jolanta Broda; Zbigniew Galus

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 550 KB
Volume: 28
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(83)85211-6

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✦ Synopsis

The electrode reaction of the Mn(II)/Mn(Hg) system in DMSO and its mixtures with water has been studied. Charge transfer rate constants, diffusion coefficients and formal potentials were determined. The transfer energies of Mn(II) from water to water + DMSO mixtures wece calculated, based on Potentials expressed in the feccoeene electrode scale. No minimum on the dependence of the standard rate constant on DMSO concentration was observed. To describe this dependence the proposed earlier model of the electrode reaction in the mixtures of water with more basic solvents was used. A decrease of cathodic Tafel slope with the increase of DMSO concentration and practically no change of the anodic one indicates that the rate of both steps of Mn(II) reduction in the mixtures rich in DMSO is rather comparable.

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