Abstract
Electrode kinetics of oxygen reduction on gold in molten lithium carbonate was investigated. Steady state cyclic voltammograms were obtained for the peroxide reduction at the gold electrode in Li{sub 2}CO{sub 3} melt, results were found to be in good agreement with the data in the literature. Impedance measurements were made as a function of frequency to evaluate the kinetics and mass transfer related parameters. Impedance data were analyzed using a Complex Nonlinear Least Square (CNLS) parameter estimation program and a graphical procedure based upon the Randles-Ershler equivalent circuit. Parameters estimated by both the methods are in good agreement. One of the proposed micro electrodes is a micro ring, which involves a gold film positioned tightly between two alumina roots. As an initial study, the stability of gold films, sputter-deposited on alumina substrates, in the Li{sub 2}CO{sub 3} melt was determined.
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