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题名: MnOx-CeO2 mixed oxide catalysts for complete oxidation of formaldehyde: Effect of preparation method and calcination temperature
作者: Tang, XF;  Li, YG;  Huang, XM;  Xu, YD;  Zhu, HQ;  Wang, JG;  Shen, WJ
关键词: MnOxCeO2 mixed oxide ;  solid solution ;  molecule oxygen activation ;  formaldehyde complete oxidation
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2006-02-22
DOI: 10.1016/j.apcatb.2005.08.004
卷: 62, 期:3-4, 页:265-273
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: MnOx-CeO2 mixed oxides prepared by sol-gel method, coprecipitation method and modified coprecipitation method were investigated for the complete oxidation of formaldehyde. Structure analysis by H-2-TPR and XPS revealed that there were more Mn4+ species and richer lattice oxygen on the surface of the catalyst prepared by the modified coprecipitation method than those of the catalysts prepared by sol-gel and coprecipitation methods, resulting in much higher catalytic activity toward complete oxidation of formaldehyde. The effect of calcination temperature on the structural features and catalytic behavior of the MnOx-CeO2 mixed oxides prepared by the modified coprecipitation was further examined, and the catalyst calcined at 773 K showed 100% formaldehyde conversion at a temperature as low as 373 K. For the samples calcined below 773 K, no any diffraction peak corresponding to manganese oxides could be detected by XRD measurement due to the formation of MnOx-CeO2 solid solution. While the diffraction peaks corresponding to MnO2 phase in the samples calcined above 773 K were clearly observed, indicating the occurrence of phase segregation between MnO2 and CeO2. Accordingly, it was supposed that the strong interaction between MnOx and CeO2, which depends on the preparation route and the calcination temperature, played a crucial role in determining the catalytic activity toward the complete oxidation of formaldehyde. (c) 2005 Elsevier B.V. All rights reserved.
关键词[WOS]: SUPERCRITICAL WATER OXIDATION ;  WET OXIDATION ;  PLATINUM CATALYSTS ;  ROOM-TEMPERATURE ;  CO OXIDATION ;  INDOOR AIR ;  NH3 ;  COMBUSTION ;  REDUCTION ;  XPS
语种: 英语
WOS记录号: WOS:000235265600010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140096
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China

Recommended Citation:
Tang, XF,Li, YG,Huang, XM,et al. MnOx-CeO2 mixed oxide catalysts for complete oxidation of formaldehyde: Effect of preparation method and calcination temperature[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2006,62(3-4):265-273.
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