Abstract
The electrochemical reduction of uranyl(VI) ion at platinum and/or mercury microelectrodes has been studied in different non-aqueous media by voltammetric techniques (cyclic voltammetry, de voltammetry at elactrodes with periodical renewal of diffusion layer, chronoamperometry, controlled-potential coulometry). Reproducible voltammetric responses have been obtained in dimethyl sulfoxide, N,N-dimethylformamide, acetic anhydride, pyridine, morpholine and ethylenediamine solvents. The mechanistic aspects involved have been studied. the solvation process of uranyl(VI) ion in the various solvents has been discussed in terms of dependence of the redox potential for the U(VI)/U(V) couple on the electron—pair donor properties of the solvents.
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