中文摘要：

采用共沉淀法制备了系列Ce0.5＋xZr0.4-xLa0.1O2-Al2O3催化剂,其中0≤x≤0.4且Ce0.5＋xZr0.4-xLa0.1O2与Al2O3的质量比为1：1.考察了该系列催化剂对柴油车排放碳烟的催化燃烧性能,并用低温N2吸附-脱附、X射线衍射（XRD）、X射线光电子能谱（XPS）、氢气程序升温还原（H2-TPR）和氧气程序升温脱附（O2-TPD）等手段对催化剂进行了表征.研究结果表明该系列催化剂均形成了具有立方萤石结构的固溶体.当x=0.2时,Ce3＋离子在催化剂表面有一定的富集,此时催化剂具有最大的β氧脱附峰和最好的表面还原性能,同时具有良好的催化碳烟氧化活性,碳烟在该催化剂的起燃温度为360°C,具有较好的应用前景.

英文摘要：

Ce0.5＋x Zr0.4-x La0.1O2-Al2O3 catalysts were prepared by co-precipitation, where 0≤x≤0.4 and the mass ratio of Ce0.5＋xZr0.4-xLa0.1O2：Al2O3 was 1：1. The catalytic activities of these catalysts for the catalytic combustion of diesel soot were investigated. The catalysts were further characterized by low temperature nitrogen adsorption-desorption, X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, H2- temperature-programmed reduction （H2-TPR）, and O2-temperature-programmed desorption （O2-TPD）. The results showed that all the catalysts formed solid solutions with a fluorite-like structure. When x=0.2, the Ce3＋ ions were partly rich on the surface of the catalyst. The catalyst was easily reduced by H2 and the desorption peak area of the β oxygen species was the largest. The light-off temperature was 360 °C for the catalytic combustion of diesel soot over the catalyst suggesting good catalytic activity and potential application in diesel soot catalytic combustion.