Supported Lal_xCexMn03 perovskite catalysts： preparation, characterization and catalytic performance in methane combustion

A serials of Lal_xCexMnO3 （x = 0, 0.2, 0.4, 0.6 and 0.8） catalysts have been prepared via a sol-gel process using citric acid as a chelating agent. The phase composition and morphology of the catalysts are characterized by XRD, SEM and TEM. La1_xCexMnO3/y-AI203/cordierite catalyst has also been prep...

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Published in材料科学前沿：英文版 Vol. 6; no. 4; pp. 304 - 310
Main Author Ying SHAO Xiao-Fei WANG Min AO Cai-Rong GONG Guo-Liang FAN Hai-Feng CHEN
Format Journal Article
LanguageEnglish
Published 2012
Subjects
催化性能
凝胶工艺
制备
堇青石蜂窝陶瓷
甲烷燃烧
表征
钙钛矿型催化剂
钙钛矿结构
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Summary:A serials of Lal_xCexMnO3 （x = 0, 0.2, 0.4, 0.6 and 0.8） catalysts have been prepared via a sol-gel process using citric acid as a chelating agent. The phase composition and morphology of the catalysts are characterized by XRD, SEM and TEM. La1_xCexMnO3/y-AI203/cordierite catalyst has also been prepared by immersion process using cordierite honeycomb ceramic as carrier and Y-AI203 as support agents. The effect of Ce-doping on the structure of perovskite and catalytic property of methane combustion is explored. The results show that with the increase of Ce substitution, the crystal structure of perovskite changes from the tetragonal system to the orthorhombic system and when the x is equal to 0.2, the catalytic property in methane combustion is the best.
Bibliography:Ying SHAO, Xiao-Fei WANG, Min AO, Cai-Rong GONG , Guo-Liang FAN, and Hai-Feng CHEN（ Sahool of Materials Science and Engineering, Tianjin University, Tianjin 300072, China）
11-5985/TB
perovskite, preparation, sol-gel, methane combustion
A serials of Lal_xCexMnO3 （x = 0, 0.2, 0.4, 0.6 and 0.8） catalysts have been prepared via a sol-gel process using citric acid as a chelating agent. The phase composition and morphology of the catalysts are characterized by XRD, SEM and TEM. La1_xCexMnO3/y-AI203/cordierite catalyst has also been prepared by immersion process using cordierite honeycomb ceramic as carrier and Y-AI203 as support agents. The effect of Ce-doping on the structure of perovskite and catalytic property of methane combustion is explored. The results show that with the increase of Ce substitution, the crystal structure of perovskite changes from the tetragonal system to the orthorhombic system and when the x is equal to 0.2, the catalytic property in methane combustion is the best.
ISSN:2095-025X
2095-0268