EPR characterisation of (CeO2)1-y(La2CuO4)y oxide mixtures and their catalytic activity for NO reduction by CO

Abstract

A series of samples of general formula (CeO₂)_1-y(La₂CuO₄)_y, with y=0, 0.17, 0.25, 0.35, 0.43, 0.50, has been analysed, mainly by EPR. Catalytic activity was tested for the reduction of NO by CO. The interaction among the oxides resulted in the formation of an La₂O–CeO₂ solid solution over a wide range of composition. CuO segregation over the surface also took place, thus enhancing catalytic activity.