The application of the spectroelectrochemical method in the studies of molybdenum,tungsten, and uranium in chloride melts |
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Authors: | V A Volkovich B D Vasin D A Danilov D E Aleksandrov |
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Institution: | 1.The First President of Russia Yeltsin Ural State Technical University (UPI),Yekaterinburg,Russia |
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Abstract: | The behavior of molybdenum(III), tungsten(IV), and uranium(VI) ions in NaCl-2CsCl-eutectic-mixture-based melt at 550°C is
studied by spectroelectrochemical method. Anodic oxidation of MoCl63− and WCl62− yields melt-soluble chloride compounds MoCl62− and WCl6− respectively. It is shown that the electrochemical recharging in the Mo(III)/Mo(IV) system is reversible; the formal standard
potential E*Mo(IV)/Mo(III)and the Gibbs energy $
\Delta G_{MoCl_4 (melt)}^*
$
\Delta G_{MoCl_4 (melt)}^*
are evaluated. The cathodic reduction of U(VI) yields U(V) ions. The cathodic reduction of W(IV) ion does not yield melt-soluble
tungsten compounds of lower oxidation state. |
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Keywords: | |
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