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Surface phase at the ideal polarized mercury electrode. Part III. The interface of mercury-KPF6 solution of propylene carbonate

par Huu Cuong, Nguyen;Jenard, André ;Hurwitz, Heinz Dieter
Référence Journal of electroanalytical chemistry, 103, 3, page (399-408)
Publication Publié, 1979-03

Article révisé par les pairs

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Résumé :

Electrocapillary measurements with a 0.1 mol kg-1 KPF6 solution in propylene carbonate at the Hg electrode are reported at different temperatures. The charge densities vs. potential obtained by means of a coulostatic injection technique agree well with the values measured by the conventional a.c. bridge method. The inner layer differential capacity as a function of the charge density displays a water-like behavior. The inner layer adsorption entropy passes through a maximum at a negative charge of the electrode. This reflects a preferential orientation of the solvent with the carbonate group towards the metal at the p.z.c. However contrarily to the case of water, the molecular arrangement in the adsorbed layer of propylene carbonate seems to be more disordered than in the bulk. © 1979.