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10.3390/ma15113963
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Article

Electrochemical Reduction of La2O3, Nd2O3, and CeO2 in LiCl-Li2O Melt

by
Alexey V. Shishkin
*,
Vladimir Yu. Shishkin
,
Aleksandr A. Pankratov
,
Anna A. Burdina
and
Yuriy P. Zaikov
Institute of High Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, 620066 Ekaterinburg, Russia
*
Author to whom correspondence should be addressed.
Materials 2022, 15(11), 3963; https://doi.org/10.3390/ma15113963
Submission received: 19 April 2022 / Revised: 26 May 2022 / Accepted: 27 May 2022 / Published: 2 June 2022
(This article belongs to the Special Issue Electrochemical Processes, Materials and Devices)
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Abstract

The reduction of pellets composed of individual CeO2, Nd2O3 and a La2O3-Nd2O3-CeO2 mixture by lithium extracted on a cathode during lithium chloride electrolysis at 650 °C was studied. The methods of cyclic voltammetry, electron microscopy, including determination of the elemental composition of the studied objects, and X-ray diffraction analysis were applied for the present study. The reduction degree of rare-earth metal (REM) oxides was determined using both the bromine method and reduction melting of the samples in the graphite crucible. The formation of the metallic phase composed of the rare-earth elements (REEs) was not observed even at the cathode potentials, corresponding to the formation of the liquid alkali metal phase, and lithium extraction, which, in the quantitative ratio, exceeds greatly the values needed for the reduction reaction. CeO2 was found to reduce to Ce2O3.
Keywords: rare-earth metals; reduction; electrolysis; bromide method; reduction melting; metallization rare-earth metals; reduction; electrolysis; bromide method; reduction melting; metallization

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MDPI and ACS Style

Shishkin, A.V.; Shishkin, V.Y.; Pankratov, A.A.; Burdina, A.A.; Zaikov, Y.P. Electrochemical Reduction of La2O3, Nd2O3, and CeO2 in LiCl-Li2O Melt. Materials 2022, 15, 3963. https://doi.org/10.3390/ma15113963

AMA Style

Shishkin AV, Shishkin VY, Pankratov AA, Burdina AA, Zaikov YP. Electrochemical Reduction of La2O3, Nd2O3, and CeO2 in LiCl-Li2O Melt. Materials. 2022; 15(11):3963. https://doi.org/10.3390/ma15113963

Chicago/Turabian Style

Shishkin, Alexey V., Vladimir Yu. Shishkin, Aleksandr A. Pankratov, Anna A. Burdina, and Yuriy P. Zaikov. 2022. "Electrochemical Reduction of La2O3, Nd2O3, and CeO2 in LiCl-Li2O Melt" Materials 15, no. 11: 3963. https://doi.org/10.3390/ma15113963

APA Style

Shishkin, A. V., Shishkin, V. Y., Pankratov, A. A., Burdina, A. A., & Zaikov, Y. P. (2022). Electrochemical Reduction of La2O3, Nd2O3, and CeO2 in LiCl-Li2O Melt. Materials, 15(11), 3963. https://doi.org/10.3390/ma15113963

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