Article Dans Une Revue Journal of Fluorine Chemistry Année : 2022

Electrochemical co-deposition of Erbium and Ytterbium in molten LiF-CaF2: An original way for lanthanides extraction on inert electrode

Laurent Massot
M. Gibilaro
P. Chamelot
  • Fonction : Auteur
  • PersonId : 1481479
  • IdRef : 091642744

Résumé

Electrochemical study of Er(III)/Er and Yb(III)/Yb systems was independently investigated in molten LiF-CaF2 on inert electrode at 840 °C using cyclic voltammetry and square wave voltammetry. Experimental results showed that two different behaviours were observed: Er(III) was reduced into metal in a one-step and diffusion controlled process and Yb(III) was first reduced into Yb(II) then into Yb. The electrochemical study of LiF-CaF2 containing both Er(III) and Yb(III) on inert Mo electrode highlighted a co-deposition of Er and Yb leading to Er-Yb surface alloys formation. Alloys formation was evidenced using open-circuit chronopotentiometry and SEM-EDS. Finally, co-extraction of Er and Yb from molten salt was carried out by electrolysis with high extraction efficiency (> 99.5%). These results pave the way to the Lanthanides extraction without involving cathode material nor another ion as for reactive electrodeposition.

Fichier principal
Vignette du fichier
Massot_2022.pdf (1.8 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-03997007 , version 1 (02-06-2023)

Licence

Identifiants

Citer

Laurent Massot, H. Meskine, M. Gibilaro, P. Chamelot. Electrochemical co-deposition of Erbium and Ytterbium in molten LiF-CaF2: An original way for lanthanides extraction on inert electrode. Journal of Fluorine Chemistry, 2022, 257-258, pp.109977. ⟨10.1016/j.jfluchem.2022.109977⟩. ⟨hal-03997007⟩
79 Consultations
140 Téléchargements

Altmetric

Partager

  • More