摘要
采用超声膜扩散法制备LnxZr1-xO2(Ln=Ce,Pr,Tb)储氧材料,通过Light-off实验对其起燃性能进行了研究,表明储氧材料LnxZr1-xO2(Ln=Pr,Tb)(x=0.6,0.8)具有比目前国际通用的CexZr1-xO2(x=0.4,0.6)储氧材料更为优越的对CO和HC起燃性能,并且在Pr,Tb含量较大的情况下(x≥0.6),能够更为有效地提高汽车尾气净化催化剂对CO和HC的起燃催化转化功能.
The oxygen storage materials LnxZr1-xO2(Ln=Ce,Pr,Tb) were synthesized using ultrasound-assisted osmosis-diffusion chemical method.Light-off technique was employed to explore the ignition properties of LnxZr1-xO2.The results indicate that the light-off properties of LnxZr1-xO2(Ln=Pr,Tb)(x=0.6,0.8) for CO or HC are superior to those of CexZr1-xO2(x=0.4,0.6) and better at improving the automobile exhaust purification catalyst when the concentration of Pr or Tb is higher than 0.6 in(LnxZr1-xO2;Ln= Pr,Tb).
出处
《内蒙古科技大学学报》
CAS
2011年第4期289-293,共5页
Journal of Inner Mongolia University of Science and Technology
基金
国家自然科学基金资助项目(50642034
50564002)