Electrochemistry of Europium(III) Chloride in 3 LiCl – NaCl, 3 LiCl – 2 KCl, LiCl – RbCl, and 3 LiCl – 2 CsCl Eutectics at Various Temperatures. Issue 8 (25th July 2017)

• Record Type: Journal Article
• Authors: Schroll, Cynthia A.; Chatterjee, Sayandev; Levitskaia, Tatiana G.; Heineman, William R.; Bryan, Samuel A.
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 8(2017)
• Page Start: H5345
• Page End: H5352
• Publication Date: 2017-07-25
• Subjects: alkali metal salts -- cyclic voltammetry -- differential pulse voltammetry -- diffusion coefficient -- electrochemistry -- europium(III) chloride -- molten salt -- spectroelectrochemistry. -- variable temperature; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0521708jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Here we report the effect of changing the eutectic melt composition on the electrochemical properties of europium(III) chloride under pyroprocessing conditions. Stoichiometry of electron-transfer, redox potentials and diffusion coefficients were determined using various electrochemical and spectroelectrochemical techniques in four different eutectic mixtures (3 LiCl - NaCl, 3 LiCl - 2 KCl, LiCl - RbCl, and 3 LiCl - 2 CsCl) while varying the temperature of the melt. It was determined that Eu 3+ undergoes a one electron reduction to Eu 2+ in each melt at all temperatures evaluated. Within each of the melts a positive shift in the redox potential as well as an increase in the diffusion coefficient for Eu 3+ was observed as the temperature increased. Also observed was a positive shift in the redox potential and increase in the diffusion coefficient for Eu 3+ as the weighted average of the cationic radii the melt composition decreased.