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




Cyclic Voltammetric Experiment - Simulation. Comparisons of the Complex Mechanism Associated with Electrochemical Reduction of Zr4 in LiCl-KCl Eutectic Molten Salt - Download this document for free, or read online. Document in PDF available to download.

1 Institute of materials engineering Blackburn, Australia 2 Comisión Nacional de Energía Atómica - CNEA ARGENTINA 3 Monash University Malaysia 4 LGC - Laboratoire de génie chimique 5 Centro de Investigaciones Energéticas Medioambientales y Tecnológicas - CIEMAT SPAIN

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.

Keywords : Zirconium LiCl-KCl Simulation Electrochemistry





Author: Cesimiro Fabian - Vittorio Luca - Than Le - Alan Bond - Pierre Chamelot - Laurent Massot - Concepción Caravaca - Tracey Hanley -

Source: https://hal.archives-ouvertes.fr/



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