中文摘要：

采用共沉淀法制备了Ce0.65Zr0.35O2（CZ）储氧材料,在传统的水陈化体系中引入了乙醇,研究了乙醇的加入对CZ储氧材料性能的影响.对所制备样品进行了傅里叶变换红外（FTIR）光谱、X射线光电子能谱（XPS）、粉末X射线衍射（XRD）、扫描电镜（SEM）、N2吸附-脱附、储氧量（OSC）和H2程序升温还原（H2-TPR）的表征,并考察了以CZ储氧材料为载体制备的单钯催化剂的三效性能.结果表明,乙醇引入陈化体系对样品的结构和性能有显著影响.以醇水共存体系陈化制备的CZ储氧材料颗粒小、堆积松散、孔径分布宽、孔容大,具有优异的储氧性能和热稳定性,经1000°C焙烧后,比表面积为29.3m2·g-1,储氧量仍高达520μmol·g-1.以此为载体制备的单钯催化剂,空燃比操作窗口宽,对C3H8、CO、NO的转化明显优于水陈化体系制备的储氧材料所制备的催化剂.

英文摘要：

Ce0.65Zr0.35O2 （CZ） mixed oxides were prepared by coprecipitation. The influence of ethanol on the performance of CZ and Pd based three-way catalysts was investigated. Samples were characterized by Fourier transform infrared （FTIR） spectroscopy, X-ray photoelectron spectroscopy （XPS）, X-ray diffraction （XRD）, scanning electron microscopy （SEM）, nitrogen sorption, oxygen storage capacity （OSC）, and hydrogen temperature-programmed reduction （H2-TPR） techniques. The precipitation aging method had an appreciable impact on oxide structure and catalyst performance. Samples aged in ethanol-water system exhibited wide pore-size distributions, large pore volumes and high redox properties, OSC and thermal stabilities. After calcination at 1000℃, the specific surface area and OSC of the samples were 29.3 m2·g^-1 and 520 μmol·g^-1, respectively. The excellent structural and textural properties resulted in a high catalytic activity, wide air-to-fuel operating range, and low light-off and full-conversion temperatures to C3H8, CO, and NO of the corresponding three-way catalyst.