Electrodeposition of Zr on graphite in molten fluorides |
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Authors: | H Groult A Barhoun E Briot F Lantelme CM Julien |
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Institution: | aUniversité P. & M. Curie-Paris6, CNRS UMR 7195, Laboratoire PECSA, 4 Place Jussieu, F-75005 Paris, France;bCNRS, UMR 7195 PECSA, Physicochimie des Electrolytes, Colloïdes, Sciences Analytiques, F-75005, Paris, France;cUniversité Abdelmalek Essaâdi, Faculté des Sciences, LPCIE, 93000, Tétouan, Maroc |
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Abstract: | The electrochemical behavior of Zr4+ using graphite working electrode has been studied in fused LiF–NaF–ZrF4 eutectic mixture (temperature range 923–1123 K). In addition to the electrochemical profile related to the deposition/dissolution of Zr metal, the cyclic voltammograms exhibit well-defined peaks attributed to the formation of zirconium carbide. A third contribution relative to the formation of Li–graphite intercalation compound and/or lithium carbide was also proposed for a better interpretation of the voltammogram. Depending on the experimental deposition conditions, the analysis of the deposits by SEM/EDX has revealed the presence of a Zr metal thin film with various porosities and compositions. Moreover, the electrochemical reduction of Zr(IV) in molten fluorides using a graphite electrode allows the extraction of pure Zr metal. |
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Keywords: | Zirconium Graphite Molten salt Alkali fluorides Electrochemistry |
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