摘要
用共沉淀法制备了Ce0.65Zr0.35O2氧化物,对不同温度处理后的样品进行了XRD、Raman、BET和储氧量(OSC)的表征。并考察了不同温度焙烧后的氧化物对单钯催化剂三效性能的影响。结果表明,焙烧温度的不同,样品具有不同的织构性能,但该样品的晶相结构稳定,老化前后均为立方相的铈锆固溶体,经1000℃焙烧后未出现相分离,说明该氧化物具有良好的热稳定性能;活性测试结果表明,不同焙烧温度的载体对催化活性影响较大,并以700℃焙烧后的氧化物为载体的催化剂具有最好的三效性能。
Ce0.65Zr0.35O2 solid solution was prepared by co-precipitation technique and characterized by X-ray diffraction （XRD）, Raman spectra, specific surface area measurements （BET） and oxygen storage capacity （OSC）. Ce0.65Zr0.35O2 solid solution was used to prepare only Pd catalyst and its influence on the performance of TWC was investigated. The results showed that the samples had different texture property, but they held the performance of structure stability. After 1000 ℃, there didn＇t appear the other crystalline phase. So the samples prepared by co-precipitation method had excellent texture and higher thermal stability. The results of the catalytic activity showed that the supports at calcination temperature had influenced the catalysis performance; the oxides calcinated at 700℃ was favorable for TWC.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第5期793-796,共4页
Journal of Functional Materials
