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《Chinese Journal of Catalysis》 2008-04
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Medium-Coupled Catalysts that Meet the Euro V Emission Standard for Gasoline Vehicles

YAO Yanling,SHI Zhonghua*,SONG Weicong,YUAN Shuhua,GONG Maochu,CHEN Yaoqiang(Key Laboratory of Green Chemistry and Technology,Ministry of Education,College of Chemistry,Sichuan University,Chengdu 610064,Sichuan,China)  
The Ce0.65Zr0.25Y0.07La0.03O1.95 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.Medium-coupled Pt-Pd-Rh monolithic catalysts were prepared by impregnating Ce0.65Zr0.25Y0.07La0.03O1.95 and LaAl2O3 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.
【Fund】: 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).
【CateGory Index】: TQ426.96
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