Methane combustion over Pd/ZrO2/SiC, Pd/CeO2/SiC, and Pd/Zr0.5Ce0.5O2/SiC catalysts

被引：35
|
作者：
Guo, Xiaoning [1 ,3 ]
Zhi, Guojuan [1 ,3 ]
Yan, Xiaoyan [1 ,3 ]
Jin, Guoqiang [1 ]
Guo, Xiangyun [1 ]
Brault, Pascal [2 ]
机构：
[1] Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
[2] Univ Orleans, CNRS, GREMI UMR6606, F-45067 Orleans 2, France
[3] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2011年 / 12卷 / 10期
关键词：
High surface area SiC; Pd/SiC catalysts; Zr0.5Ce0.5O2 solid solution; Methane combustion; MESOPOROUS SILICON-CARBIDE; CEO2-ZRO2; SOLID-SOLUTIONS; LOW-TEMPERATURE; MIXED OXIDES; PALLADIUM; OXIDATION; BEHAVIOR; DEACTIVATION; REDUCTION; ALUMINA;
D O I：
10.1016/j.catcom.2011.02.007
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The performances of different promoters (CeO2, ZrO2 and Ce0.5Zr0.5O2 solid solution) modified Pd/SiC catalysts for methane combustion are studied. XRD and XPS results showed that Zr4+ could be incorporated into the CeO2 lattice to form Ce0.5Zr0.5O2 solid solution. The catalytic activities of Pd/CeO2/SiC and Pd/ZrO2/SiC are lower than that of Pd/Ce0.5Zr0.5O2/SiC. The Pd/Ce0.5Zr0.5O2/SiC catalyst can ignite the reaction at 240 degrees C and obtain a methane conversion of 100% at 340 degrees C, and keep 100% methane conversion after 10 reaction cycles. These results indicate that active metallic nanoparticles are well stabilized on the SiC surface while the promoters serve as oxygen reservoir and retain good redox properties. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：870 / 874
页数：5
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