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Experimental and simulation study of the electrode reaction mechanism of La3+ in LiCl-KCl eutectic molten salt

Fabian, Cesimiro P. and Luca, Vittorio and Chamelot, Pierre and Massot, Laurent and Caravaca, Concepción and Lumpkin, Gregory R. Experimental and simulation study of the electrode reaction mechanism of La3+ in LiCl-KCl eutectic molten salt. (2012) Journal of The Electrochemical Society (JES), vol.159 (n° 4). pp. 63-67. ISSN 0013-4651

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Official URL: http://dx.doi.org/10.1149/2.057204jes

Abstract

Nuclear energy increasingly represents an important option for generating largely clean CO2-free electricity. The present investigation addressed the electrochemical reduction of La3+, a rare earth element, in LiCl - KCl eutectic molten salt in the temperature range 450–550°C using transient techniques such as cyclic voltammetry (CV) and square-wave voltammetry (SWV). Simulation of the CV data suggested a reaction mechanism in which lanthanum reduction occurred in a single three-electron step (La3+ + 3e− → La°). The rate constant, k° was determined to be 5.7 x 10−3, 14.6 x 10−3 and 31.7 x 10−3 cm/s and the Matsuda et al.1 dimensionless parameter Ʌ was 0.82, 1.52 and 2.89 for temperatures of 450, 500 and 550°C, respectively and therefore it was concluded that the was process quasi reversible.

Item Type:Article
HAL Id:hal-00861174
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)
Laboratory name:
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Deposited By: Laurent MASSOT
Deposited On:12 Sep 2013 08:37

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