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http://dx.doi.org/10.7733/jnfcwt.2021.19.2.161

Electrochemical Behavior of Sm(III) on the Aluminium-Gallium Alloy Electrode in LiCl-KCl Eutectic  

Ye, Chang-Mei (Institute of High Energy Physics, Chinese Academy of Sciences)
Jiang, Shi-Lin (Institute of High Energy Physics, Chinese Academy of Sciences)
Liu, Ya-Lan (Institute of High Energy Physics, Chinese Academy of Sciences)
Xu, Kai (Ningbo Institute of Industrial Technology, Chinese Academy of Sciences)
Yang, Shao-Hua (Jiangxi University of Science and Technology)
Chang, Ke-Ke (Ningbo Institute of Industrial Technology, Chinese Academy of Sciences)
Ren, Hao (Institute of High Energy Physics, Chinese Academy of Sciences)
Chai, Zhi-Fang (Institute of High Energy Physics, Chinese Academy of Sciences)
Shi, Wei-Qun (Institute of High Energy Physics, Chinese Academy of Sciences)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.19, no.2, 2021 , pp. 161-176 More about this Journal
Abstract
In this study, the electrochemical behavior of Sm on the binary liquid Al-Ga cathode in the LiCl-KCl molten salt system is investigated. First, the co-reduction process of Sm(III)-Al(III), Sm(III)-Ga(III), and Sm(III)-Ga(III)-Al(III) on the W electrode (inert) were studied using cyclic voltammetry (CV), square-wave voltammetry (SWV) and open circuit potential (OCP) methods, respectively. It was identified that Sm(III) can be co-reduced with Al(III) or Ga(III) to form AlzSmy or GaxSmy intermetallic compounds. Subsequently, the under-potential deposition of Sm(III) at the Al, Ga, and Al-Ga active cathode was performed to confirm the formation of Sm-based intermetallic compounds. The X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analyses indicated that Ga3Sm and Ga6Sm intermetallic compounds were formed on the Mo grid electrode (inert) during the potentiostatic electrolysis in LiCl-KCl-SmCl3-AlCl3-GaCl3 melt, while only Ga6Sm intermetallic compound was generated on the Al-Ga alloy electrode during the galvanostatic electrolysis in LiCl-KCl-SmCl3 melt. The electrolysis results revealed that the interaction between Sm and Ga was predominant in the Al-Ga alloy electrode, with Al only acting as an additive to lower the melting point.
Keywords
Co-reduction behaviors; Sm(III); Al-Ga alloy electrode; LiCl-KCl;
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