A series of sample having the stoichiometry La~4BaCu~5~-~xMn~xO~1~2 (x=0-5) were prepared, characterized by XRD, IR and H~2-TPR and used as catalyst for NO+CO reaction. It was found that they have 5-layered ABO~3-type structure. The results of H~2-TPR showed that the Cu ion was more easily reduced while a part of them was replaced by Mn ions. Their catalytic behavior to NO+CO reaction was investigate, La~4BaCu~2Mn~3O~1~2 showed the highest catalyst activity for the reaction than the others. The reaction mechanism is discussed: the activity of the catalysts could be attributed to the Cu ions, but it was improved when Mn ions took the place of some Cu ions.

Key words: CATALYSIS, CARBON MONOXIDE, ELIMINATE, LAYER STRUCTURE, COMPLEX, CATALYTIC ACTIVITY, NITROGEN MONOXIDE, AMINE OXIDE, STRUCTURE CHARACTERISTICS