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Title: Determination of kinetic properties of Sm(III)/Sm(II) reaction in LiCl–KCl molten salt using cyclic voltammetry and electrochemical impedance spectroscopy

Journal Article · · Journal of Radioanalytical and Nuclear Chemistry
ORCiD logo [1];  [2];  [3];  [2];  [4]
  1. Virginia Commonwealth Univ., Richmond, VA (United States); Korea Atomic Energy Research Inst., Daejeon (South Korea)
  2. Virginia Commonwealth Univ., Richmond, VA (United States)
  3. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  4. Boise State Univ., ID (United States)
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Electrochemical and kinetic properties of samarium (Sm) in LiCl-KCl eutectic salt were explored at various concentrations and temperatures. Cyclic voltammetry (CV) were performed to determine diffusion coefficient and the rate constant (k0). In addition, electrochemical impedance spectroscopy (EIS) was conducted for additional understandings on the kinetic behaviors of Sm(III)/Sm(II) couple. The values of the diffusion coefficients were in the range of 3.54 × 10-6 to 9.58 × 10-5 cm2 s-1 and the values of k0 were estimated to be in the range of 0.63 × 10-2 to 1.11 × 10-2 cm s-1. The values of i0 for Sm(III)/Sm(II) were computed by obtaining the charge transfer resistance from the curve fitting analysis, ranging from 1.04 ×10-3 to 2.97×10-3 A cm-2.

Research Organization:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
1575283
Report Number(s):
INL/JOU-17-41558-Rev000; TRN: US2001340
Journal Information:
Journal of Radioanalytical and Nuclear Chemistry, Vol. 322, Issue 2; ISSN 0236-5731
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

References (11)

Chemical basis for pyrochemical reprocessing of nuclear fuel journal January 1991
Anodic dissolution of U, Zr and U–Zr alloy and convolution voltammetry of Zr4+|Zr2+ couple in molten LiCl–KCl eutectic journal October 2011
Determining the Exchange Current Density and Tafel Constant for Uranium in LiCl/KCl Eutectic journal October 2014
Electron-transfer kinetics from cyclic voltammetry. Quantitative description of electrochemical reversibility journal June 1981
Electrochemical impedance spectroscopy study of indium couples in LiCl-KCl eutectic at 450 °C journal June 1996
Limitations in the analysis of ac impedance data with poorly separated faradaic and diffusional processes journal February 1991
An electrochemical study of samarium ions in the molten eutectic LiCl+KCl journal October 2004
Electrochemical Formation of Divalent Samarium Cation and Its Characteristics in LiCl–KCl Melt journal June 2018
Electrochemical Properties and Analyses of CeCl 3 in LiCl-KCl Eutectic Salt journal January 2015
Evaluation of the Electrochemical Behavior of CeCl3 in Molten LiCl-KCl Eutectic Utilizing Metallic Ce as an Anode journal January 2011
Electrochemical Impedance Spectroscopy and its Applications book January 2002

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Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
samarium
exchange current density
molten salt
impedance spectroscopy