Modelling of elementary kinetics of \H2\ and \CO\ oxidation on ceria pattern cells
By HC Patel and AN Tabish and PV Aravind
Published in Electrochimica Acta
NULL
2015
Abstract
Elementary kinetic mechanisms of fuel oxidation on ceria have not been dealt with in detail in literature. An elementary kinetic model is developed considering charge transfer and adsorption steps for electrochemical \H2\ and \CO\ oxidation on ceria. The reaction chemistry is solved by fitting previously obtained impedance spectra for \H2\ and \CO\ oxidation on ceria. The rate determining step is found to be the charge transfer rather than the adsorption for both \H2\ and CO. A method is presented to extend the kinetics obtained from pattern anodes to macroscopic simulations in which the activation overvoltage can be calculated on the basis of elementary kinetics.
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