Catalytic N 2 O decomposition over CeMeO y /γ‐Al 2 O 3 (Me = Mn, Cu, Zn) catalysts prepared by impregnation method

A series of CeMeO y /γ‐Al 2 O 3 (Me = Mn, Cu, Zn) samples for effective catalytic N 2 O decomposition were prepared by impregnation method with large specific surface area support. The H 2 ‐TPR and O 2 /CO 2 ‐TPD results showed that the addition of CeO 2 to samples of MeO x /γ‐Al 2 O 3 was beneficial for the reduction of catalytic components, the desorption of surface oxygen, and the total amount of basic sites on the sample surface. The characterization of TPR, TPD, and XRD, and so forth indicated that synergistic action among catalytic components on the support was probably the origin of good activity towards N 2 O decomposition over Ce(1.2)MeO y /γ‐Al 2 O 3 catalyst. The test that lasted for 200 hr showed that the sample of Ce(1.2)MeO y /γ‐Al 2 O 3 prepared by impregnation method had good stability on N 2 O decomposition in a mixture containing certain amounts of O 2 and H 2 O under applied experimental conditions. The characterization results of SEM and EDX over samples before and after stability indicated that the prepared Ce(1.2)MeO y /γ‐Al 2 O 3 catalyst had good stable structure, which would provide the basis for further study, such as pilot‐scale investigation, in this field.