摘要
采用共沉淀法技术制备了Ce0.35Zr0.55Y0.10固溶体,并对其进行了比表面积、储氧量的测试和XRD的表征。将其用于低贵金属Pt-Rh型三效催化剂的制备,考察了CeO2-ZrO2-Y2O3对三效催化剂性能的影响。结果表明,Ce0.35Zr0.55Y0.10具有与Ce0.50Zr0.50O2相似的立方结构和相近的储氧量,经高温(1000℃)后仍能保持较大的比表面积(38.66m2·g-1)。和含Ce0.50Zr0.50O2的三效催化剂相比,含CeO2-ZrO2-Y2O3的三效催化剂经高温老化后,C3H8,CO,NO仍具有较高的转化率和较低的起燃温度。
Ce0.35Zr0.55Y0.10 solid solution was prepared by co-precipitation technique and characterized by specific surface area measurements and X-ray diffraction （XRD）. Ce0.35Zr0.55Y0.10 was used to prepare low Pt-Rh three-way catalyst （TWC） and its influence on the performance of TWC was investigated. The results show that Ce0.35Zr0.55Y0.10 has a cubic structure similar to Ce0.50Zr0.50O2 and its specific surface area can maintain higher than Ce0.50Zr0.50O2 after high temperature calcinations. After aging at 1000℃, the catalyst containing Ce0.35Zr0.55Y0.10 still shows higher conversion of C3H8, CO and NO and lower light-off temperature in comparison with Ce0.50Zr0.50O2 TWC.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2006年第2期174-178,共5页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学重点基金(20333030)
国家自然科学基金(20273043)资助项目
关键词
低贵金属
三效催化剂
稀土
low precious metal
three-way catalysts
rare earths
