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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/6262

Title: Cyclic voltammetric experiment - simulation comparisons of the complex mechanism associated with electrochemical reduction of Zr4+ in LiCl-KCl eutectic molten salt
Authors: Fabian, CP
Luca, V
Le, TH
Bond, AM
Chamelot, P
Massot, L
Caravacaf, C
Hanley, TL
Lumpkina, GR
Keywords: NUCLEAR ENERGY
ZIRCONIUM
FISSION PRODUCTS
SPENT FUELS
MOLTEN SALTS
THERMODYNAMICS
Issue Date: 29-Nov-2012
Publisher: The Electrochemical Society
Citation: Fabian, C. P., Luca, V., Le, T. H., Bond, A. M., Chamelot, P., Massot, L., . . . Lumpkin, G. R. (2013). Cyclic Voltammetric Experiment - Simulation Comparisons of the Complex Mechanism Associated with Electrochemical Reduction of Zr4+ in LiCl-KCl Eutectic Molten Salt. Journal of the Electrochemical Society, 160(2), H81-H86.
Abstract: Nuclear energy increasingly represents an important option for generating largely clean CO2-free electricity and zirconium is a fission product that is expected to be present in irradiated fuels. The present investigation addresses the electrochemical reduction of Zr4+ to Zro in LiCl - KCl eutectic molten salt in the temperature range 425–550°C using cyclic voltammetry (CV), square-wave voltammetry (SWV) and bulk electrolysis. Simulations of the CV data indicate that the initial reduction proceeds through surface confined steps: Zr4+* + 2e− ↔ Zr2+* and Zr2+* + 2e− ↔ Zr* processes (* adsorbed species) followed by a peak-shaped complex diffusion controlled step that consists of a combination of closely spaced processes associated with the reactions Zr4+ + 4e− → Zro and Zr4+ + 3e− → Zr+*. Zr+*, probably in the form of ZrCl* is then further reduced to Zro* at even more negative potentials. The simulations provide the first quantitative analysis of the thermodynamics and kinetics of the Zr4+ reduction in the LiCl-KCl eutectic. © 2012, The Electrochemical Society.
URI: http://dx.doi.org/10.1149/2.016302jes
http://apo.ansto.gov.au/dspace/handle/10238/6262
ISSN: 0013-4651
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