Simultaneous removal of soot and NO over thermal stable Cu-Ce-Al mixed oxides

Cu-Ce-Al mixed oxides were synthesized by depositing Al2O3 powders in Cu-Ce gel and then were treated at 800 degrees C in air for 10 h. The modification of Al2O3 obviously increases the textural stability of the catalyst and improves the dispersion of CuO and CeO2, which induces a lower soot oxidation temperature and a higher simultaneous NO reduction. in addition, the adsorption behavior of NOx on the Cu-Ce-Al surface is quite different from that for Cu-Ce, which may be also an important factor for the improved activity. (C) 2008 Elsevier B.V. All rights reserved.