Calcium oxide decreases the NO selectivity from N2O decomposition compared to N2O homogeneous decomposition.
N2 has a much higher selectivity from N2O decomposition compared to NO for both homogeneous and CaO-catalyzed N2O decomposition.
The NO formation on the CaO (1 0 0) surface is likely to proceed via the reaction between a surface adsorbed atomic O and a gaseous N2O molecule.