Stable oxygen concentration in exhausts is a prime factor in catalytic purification of the vehicle exhausts. Catalytic coating of Nanostructured CeO2 is added into ceramic support to adjust the oxygen concentration because it possesses a unique oxygen storage capacity (OSC). This paper, the cordierite-CeO2 composite ceramic with oxygen storage capacity was prepared as a support material for catalytic converters. The oxygen storage-release performance of the ceramics, adsorption process of oxygen and the oxygen storage, was examined by a gas chromatography. Results show that the novel cordierite-CeO2 composite ceramic is helpful in improving the purification effect of vehicle exhausts.

Keywords: Cordierite, CeO2, Oxygen storage capacity, Ceramic.