A comparative study of formaldehyde and carbon monoxide complete oxidation on MnOx-CeO2 catalysts

被引:74
|
作者
Liu Xuesong [1 ]
Lu Jiqing [1 ]
Qian Kun [2 ,3 ]
Huang Weixin [2 ,3 ]
Luo Mengfei [1 ]
机构
[1] Zhejiang Normal Univ, Inst Phys Chem, Zhejiang Key Lab React Chem Solid Surfaces, Jinhua 321004, Peoples R China
[2] Univ Sci & Technol China, Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
[3] Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China
关键词
MnOx-CeO2; catalysts; complete oxidation; HCHO; CO; rare earths; CO OXIDATION; OXIDE CATALYST; MANGANESE OXIDES; TEMPERATURE; CERIA; COMBUSTION; REDUCTION; SURFACE; OXYGEN; MECHANISM;
D O I
10.1016/S1002-0721(08)60263-X
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
MnOx-CeO2 composite catalysts were prepared by a coprecipitation method and tested for formaldehyde (HCHO) and carbon monoxide (CO) oxidation. X-ray photon spectroscopy (XPS) results indicated that the average oxidation state of surface Mn species in CeMn composite catalyst was higher compared to the pure MnOx. The enhancement of reactivity for HCHO oxidation was due to the activation of the lattice oxygen species in MnOx by the addition of CeO2, which was confirmed by the H-2 temperature programmed reduction (H-2-TPR) results. The remarkable enhancement of reactivity for CO oxidation by the addition of CeO2 was due to the active oxygen species generated on the CeO2 surface which directly participated in the reaction.
引用
收藏
页码:418 / 424
页数:7
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