Abstract
The kinetics of the catalytic reaction between carbon monoxide and nitrous oxide has been examined on Sc2O3 and MgO in a differential flow reactor at atmospheric pressure. On Sc2O3, the apparent activation energy was 126 ± 4 kJ mol−1 from 633 to 723 K while a value of 63 ± 4 kJ mol−1 was obtained for MgO from 547 to 673 K. On both catalysts, the surface mechanism has been interpreted by a reaction scheme involving each reactant as an adsorbed species with CO and N2O being further involved in subsequent steps during the course of the surface reaction. The metal/oxygen bond polarization appears to influence both the strength and form of CO adsorption where the reactants interact as surface species each bound to two surface sites on Sc2O3 and on one surface site each on MgO.
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