Effects of Ce on catalytic combustion of methane over Pd-Pt/AlOcatalyst

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Xing Fan Fan Wang Tianle Zhu Hong He School of Chemistry and Environment Beihang University Beijing China College of Environmental and Energy Engineering Beijing University of Technology Beijing China [1 ,1 ,1 ,2 ,1 ,100191 ,2 ,100124 ]
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Journal of Environmental Sciences | 2012年 / 03期
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Activity and stability of 1%Pd-0.2%Pt/Al2O3 and 1%Pd-0.2%Pt/0.6%Ce/Al2O3 catalysts prepared by impregnation method for catalytic combustion of methane in air were investigated. The catalysts before and after reaction were characterized by BET, CO chemisorption, XRD and XPS techniques. Results showed that the presence of Ce significantly increased the activity and thermal stability of the Pd-Pt/Al2O3 catalyst towards methane combustion, which could be attributed to more highly-dispersed active PdO particles over the Pd-Pt/Ce/Al2O3 catalyst surface as well as the retarded sintering of PdO and the maintained oxidized state of surface Pd during the combustion process in the presence of Ce.
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页码：507 / 511
页数：5
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