Journal
ELECTROCHIMICA ACTA
Volume 118, Issue -, Pages 150-156Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.11.145
Keywords
Electroseparation; Magnesium electrode; Potentiostatic electrolysis; Molten chlorides
Categories
Funding
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education
- Institute of Nuclear Physics and Chemistry
- National 863 Project of Ministry of Science and Technology of China [2011AA03A409]
- Major Research plan of the National Natural Science Foundation of China [91226201, 91326113]
- National Natural Science Foundation of China [21173060, 21271054]
- Fundamental Research funds for the Central Universities [HEUCF201310012]
- development fund of China Academy of Engineering Physics [2012B0301033]
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The electrochemical behaviour and extraction efficiency of DyCl3 and GdCl3 solutions were studied by cyclic voltammetry, square wave voltammetry and open-circuit chronopotentiometry in the eutectic LiCl-KCl at 773 K using inert and reactive electrodes, i.e. W and Mg, respectively. On W and Mg electrodes, Dy(III) ions are reduced to metallic dysprosium through two consecutive steps. The selective electrodepositing of dysprosium in a form of Mg-Dy alloys can be easier than that in a pure metallic form, without reduction of the extraction yield. Potentiostatic electrolysis experiments were performed to extract Dy from GdCl3 and DyCl3 mixtures at magnesium electrodes. XRD patterns of deposit indicated that Mg3Dy phase was formed. Scanning electron microscope (SEM) images with Energy dispersive X-ray Spectroscopy (EDS) showed the grain size was refined with a greater content of Dy in alloys (C) 2013 Elsevier Ltd. All rights reserved.
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