Oscillographic polarography has been used to determine the diffusion coefficient of silver ion over a wide composition range of NaNO,-KNO, at 315, 340 and 360ยฐC. Agreement of the polarographic diffusion coefficient with the chronopotentiometric diiusion coefficient has been found. The Ag+ diffusion
Electroreduction of uranyl ion in calcium nitrate tetrahydrate melt
โ Scribed by Narottam P. Bansal; James A. Plambeck
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 539 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0013-4686
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โฆ Synopsis
Ah&act -The electrochemical reduction of uranyl ions in calcium nitrate tetrahydrate has been studied by polarography, cyclic voltammetry, chronopotentiometry and the potential-step techniques. The UO:+/UO: couple, reversible in the aqueous system, is complicated by disproportionation of UO: and by formation of insoluble UO,(s), both as a monolayer and in bulk, on the electrode surface.
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The polarographic reduction of uranyl ion in nitric acid solution are found to be one electron reduction mechanism at lower acid concentration (0.1 M HNO,) and two electron mechanism at high acid concentration (2 M HNO,). Methanol shifted the half wave potentials to more negative values and increase
The diffusion coefEcients of AgO have been measured in molten mixtums of NaNO, and KNO, with varying molar ratios, by a linear diffusion cell of variable path length. The results b are quoted for temFtures below 420% in the form of an empirical equation loga D = --a -f. Diffusion coe5cients are not