Abstract
Gibbs energy showed that AlCl3 can chloridize Pr 6O11 and release Pr(III) ions in the LiCl-KCl-Pr 6O11-AlCl3 melts. The co-reduction process of Al(III), Pr(III) and Li(I) ions was investigated in the LiCl-KCl-Pr 6O11-AlCl3 melts. Three signals, corresponding to different Al-Pr intermetallic compounds, were observed by cyclic voltammetry, square wave voltammetry and open circuit chronopotentiometry. Potentiostatic and galvanostatic electrolysis were conducted to extract Pr element from LiCl-KCl eutectic melts by forming Al-Pr and Al-Li-Pr alloys, respectively. X-ray diffraction (XRD) indicated that both Al-Pr and Al-Li-Pr alloys comprised Al2Pr phase. The composition of Al-Li-Pr alloys was analyzed by inductive coupled plasma atomic emission spectrometer (ICP-AES). The proportion of Pr element in Al-Li-Pr alloys exceeded 40 wt.% when the concentration of AlCl3 reached 8 wt.% in the LiCl-KCl-Pr6O11(1 wt.%) melts.
Original language | English |
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Pages (from-to) | 457-462 |
Number of pages | 6 |
Journal | Electrochimica Acta |
Volume | 88 |
DOIs | |
State | Published - 15 Jan 2013 |
Externally published | Yes |
Keywords
- Al-Li-Pr alloys
- Electrodeposition
- Extraction of Pr
- Molten chlorides