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Journal of Radioanalytical and Nuclear Chemistry

, Volume 322, Issue 2, pp 1031–1037 | Cite as

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

  • Dalsung YoonEmail author
  • Jinnapat Pormatikul
  • Michael Shaltry
  • Supathorn Phongikaroon
  • Kerry Allahar
Article

Abstract

Electrochemical and kinetic properties of samarium (Sm) in LiCl–KCl eutectic salt were investigated 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 further 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.

Keywords

Samarium chloride Kinetic parameters LiCl–KCl EIS Pyroprocess 

Notes

Acknowledgements

Experiments were prepared and conducted under the support of Idaho National Laboratory–Laboratory Directed Research and Development (INL-LDRD) at the Center for Advanced Energy Studies (CAES). Data analysis was performed at Virginia Commonwealth University using Faculty Career Award funding received from the Nuclear Regulatory Commission.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Department of Mechanical and Nuclear EngineeringVirginia Commonwealth UniversityRichmondUSA
  2. 2.Pyropchemistry and Molten Salt System DepartmentIdaho National LaboratoryIdaho FallsUSA
  3. 3.Department of Materials Science and EngineeringBoise State UniversityBoiseUSA
  4. 4.Nucelar Fuel Cycle Process Research DivisionKorea Atomic Energy Research InstituteDaejeonSouth Korea

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