Kinetics and mechanism of NO decomposition over La0.4Sr0.6Mn0.8Ni0.2O3 perovskite-type oxides

The kinetic equation of NO decomposition over perovskite-type oxide is deduced. The reaction order for NO is 1 in the range 0.5-2.0 vol.% NO/He, while it varies from −0.24 to −0.08 for O2 (0-6 vol.% O2/He), depending on the temperature. The item K−6 (K−7)1/2PNO (PO2)1/2, which reflects the reciprocity of O2 and NO in the reaction, is introduced in the kinetics for the first time.r=k3K1K2PNO2[L]1+K1PNO+(K−5K−6K−71/2/K1)PO21/2+K−6K−71/2PNOPO21/2