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《Journal of Shantou University(Natural Science Edition)》 2012-04
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Preparation and Three-Way Catalytic Performance of La_(0.9)Mg_(0.1)Cr_(1-x)M_xO_3 Peroviskite-Type Mixed Oxides

GUO Xi-kun1,SHI Yan-zhong1,CHEN Yao-wen2(1.Department of chemistry,Shantou University,Shantou 515063,Guangdong,China; 2.Central Laboratory,Shantou University,Shantou 515063,Guangdong,China)  
A series of La0.9Mg0.1Cr1-xMxO3(M = Fe、Cu、Ni)perovskite-type mixed oxides were synthesized using sol-gel method and the performance of catalysts was also investigated.The relationship between the catalytic activity and the structure of catalyst was explored by using the X-ray diffraction(XRD) and scanning electron microscopy(SEM).The results showed that the La0.9Mg0.1Cr0.8Cu0.2O3 catalyst exhibited high three-way catalytic performance when it was calcined at 750 ℃.Under the function of the catalyst,the T50 of C3H6、CO and NO were 229 ℃、202 ℃ and 286 ℃;the T90 of C3H6、CO and NO were 325℃、247℃ and 348 ℃;the conversion efficiency of C3H6、CO and NO were 91.1%、99.3% and 93.9% respectively at 500 ℃.The La0.9Mg0.1Cr0.8Cu0.2O3 catalyst had good perovskite-type crystal structure and its grain was nanocrystal,and it showed excellent thermal stabilities and good catalytic property.
【Fund】: 广东省科技计划项目(2006B36702003);; 国家自然科学基金(60971075)
【CateGory Index】: O643.36
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