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Cyclic Voltammetric Experiment - Simulation. Comparisons of the Complex Mechanism Associated with Electrochemical Reduction of Zr4+ in LiCl-KCl Eutectic Molten Salt

Fabian, Cesimiro P. and Luca, Vittorio and Le, Than H. and Bond, Alan M. and Chamelot, Pierre and Massot, Laurent and Caravaca, Concepción and Hanley, Tracey L. and Lumpkin, Gregory R. Cyclic Voltammetric Experiment - Simulation. Comparisons of the Complex Mechanism Associated with Electrochemical Reduction of Zr4+ in LiCl-KCl Eutectic Molten Salt. (2012) Journal of The Electrochemical Society (JES), vol. 160 (n° 2). pp. H81-H86. ISSN 0013-4651

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Official URL: http://dx.doi.org/10.1149/2.016302jes

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− →Zr 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.

Item Type:Article
Additional Information:Thanks to the Electrochemical Society editor. The definitive version is available at http://jes.ecsdl.org/content/160/2/H81
HAL Id:hal-00816991
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Centro de Investigaciones Energéticas Medioambientales y Tecnológicas - CIEMAT (SPAIN)
Other partners > Comisión Nacional de Energía Atómica - CNEA (ARGENTINA)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Other partners > Australian Nuclear Science and Technology Organisation - ANSTO (AUSTRALIA)
Other partners > Monash University (AUSTRALIA)
Laboratory name:
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Deposited By: Laurent MASSOT
Deposited On:23 Apr 2013 12:38

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