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.

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