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《Journal of Materials Science and Engineering》 2009-01
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Characterization of Nanosized Rare Earth Al-Ce-La-O Composites Prepared by Coprecipitation

ZHANG Ai-min,ZHANG Yong,ZHAO Yun-kun,HE Xiao-kun,LU Jun,WU Le-gang(Kunming Sino-Platinum Metals Catalyst Co.,Ltd.,Kunming 650106,China)  
Nanosized rare earth Al-Ce-La-O composites were coprecipitated using inorganic as raw materials.TEM,low temperature nitrogen adsorption,XRD and TPR-H_2 were used to characterize particle size,morphology and physicochemical properties.It was revealed that the as-prepared composites,consisted of irregular sphere particles in either amorphous or polycrystal state with an average size of about 50nm,exist in honeycomb texture.The specific area is 93.6 m~2·g~(-1) and total pore volume is 0.2086 cm~3·g~(-1),and the pore size has a bi-peak distribution characteristic.The fact that present materials have excellent oxygen storage capacity(OSC) of about 2216 μmol·g~(-1) and relative low initial reduction temperature of 127℃ indicates that present nanosized composites are potential washcoat material of three-way catalyst used for auto exhaust purification.
【Fund】: 国家高技术研究发展计划(863)资助项目(2006AA03Z462)
【CateGory Index】: TB383.1
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