Abstract
The physicochemical properties of Eu cations in AlCl3-NaCl melts have been studied for the purpose of spent nuclear fuel recycling via electrochemical and spectroscopic methods. Eu metal dissolves in the AlCl3-NaCl melts to generate divalent europium and Al metal while releasing chlorine gas. The effect of Lewis acidity of melt on the electrochemical behaviors of Eu(II) has been studied. In Lewis base melt of AlCl3-NaCl, Eu(III), and Al(III) can be co-reduced at the potential between Al deposition and Eu(II) oxidation. With the enhanced Lewis acidity of the molten salt, Eu(II) diffusion becomes more facile. The in situ absorption spectra of Eu(II) in AlCl3-NaCl melts reveal that the complexation ligand of Eu(II) changes with the melt Lewis acidity, thereby affecting the electrochemical behaviors of Eu(II) species. In addition, the redox potential of the Eu(II)/Eu(III) conversion reaction is more positive than that of Sm(II)/Sm(III).
Funder
National Natural Science Foundation of China
National Science Fund for Distinguished Young Scholars
Publisher
The Electrochemical Society
Subject
Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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