摘要
制备了具有高性能的稀土储氧材料Ce0.65Zr0.25Y0.07La0.03O1.95和镧稳定的氧化铝(La-Al2O3),并以此为基础制备了Pt-Pd-Rh型中偶汽油车尾气净化催化剂.老化前后的性能检测表明,稀土储氧材料具有较大的比表面积和优异的储氧性能,La-Al2O3也具有优越的织构性能和高的热稳定性.催化剂对模拟尾气具有较高的催化活性和稳定性,在捷达-MT型汽油车上的测试结果表明,经该催化剂处理后的尾气排放能够满足欧Ⅴ排放标准.
The Ce0.65Zr0.25Y0.07 La0.03O1.95 oxygen storage material and La-stabilized alumina （La-Al2O3） were prepared. After aging at 1 000 ℃ for 5 h, Ce0.65Zr0.25Y0.07La0.03O1.95 maintains excellent textural and oxygen storage properties, and after calcination at 900 ℃ for 4 h, La-Al2O3 has superior textural properties. Mediumcoupled Pt-Pd-Rh monolithic catalysts were prepared by impregnating Ce0.65Zr0.25Y0.07La0.03O1.95 and La-Al2O3 with Pt（NO3 ）2, Pd（NO3）2, and Rh（NO3）3 solutions and then washcoating on the cordierite honeycomb. The medium-coupled catalysts show high low-temperature activity and good thermal stability. The results from the emission test of a JETTA-MT vehicle show that the catalysts can meet EuroV emission requirements.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第4期316-318,共3页
基金
国家高技术研究发展计划(863计划2006AA06Z347)
高等学校博士学科点专项科研基金(20070610026).
关键词
储氧材料
镧稳定的氧化铝
中偶催化剂
整车实验
oxygen storage material
lanthanum-stabilized alumina
medium-coupled catalyst
vehicle test
