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Electrochemistry of praseodymium in LiF–CaF2

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Abstract

The electrochemical behaviour of PrF3 was studied in the LiF–CaF2 (79/21 molar ratio) at 1,213 K. Inert (W) and reactive (Ni) electrodes were used. Pr(III) ions are reduced in a single, three electron exchange. The redox potential of the Pr(III)/Pr couple at the inert electrode was observed very close to the decomposition potential of the LiF–CaF2 melt. Experiments using reactive working electrode were done. The results show the potential shift connected to the alloying reactions of Pr and Ni. Deposition of Pr–Ni layer was confirmed by SEM-EDX analysis. Conclusions for the Pr separation possibilities from spent nuclear fuel were done.

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Acknowledgment

This work was supported by Ministry of Industry and Trade of the Czech Republic and by European Commission financial contribution within the 7th Framework programme, under the contract 211267 “ACSEPT”.

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Authors and Affiliations

  1. Department of Fluorine Chemistry, Nuclear Research Institute Řež plc, 250 68, Husinec-Řež 130, Czech Republic

    M. Straka, M. Korenko & L. Szatmáry

  2. Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, 845 36, Bratislava, Slovakia

    M. Korenko

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  1. M. Straka
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  2. M. Korenko
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  3. L. Szatmáry
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Correspondence to M. Straka.

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Straka, M., Korenko, M. & Szatmáry, L. Electrochemistry of praseodymium in LiF–CaF2 . J Radioanal Nucl Chem 289, 591–593 (2011). https://doi.org/10.1007/s10967-011-1128-5

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  • DOI: https://doi.org/10.1007/s10967-011-1128-5

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