Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 149, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2023.107470
Keywords
Microelectrode; Pyroprocessing; Spent nuclear fuel; Allen-Hickling plot; Exchange current density; Activation energy
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This study aimed to develop a new microelectrode for use in high-temperature molten salts, and evaluated its performance by determining the parameters of the Sm(III)/Sm(II) reaction. The electrochemical and kinetic properties of the samarium ion in the temperature range 723-823 K were calculated. The results show that the developed microelectrode can provide the necessary kinetic parameters for designing pyroprocesses.
A microelectrode is useful to determine electrochemical parameters such as diffusion coefficient, exchange current density, and Tafel slope without the limitations of ion diffusion. This study aims to develop a new microelectrode for use in high-temperature molten salts, which has been evaluated by determining the parameters of the Sm(III)/Sm(II) reaction in a LiCl-KCl eutectic molten salt. The electrochemical and kinetic properties of the samarium ion in the temperature range 723-823 K were calculated using the limiting current from cyclic voltammograms and the Allen-Hickling equation. The results imply that kinetic parameters (exchange current density and charge transfer coefficient) critical for designing pyroprocesses can be obtained using the developed microelectrode.
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