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学科主题: 物理化学
题名: Low-temperature oxidation of ethanol over a Mn0.6Ce0.4O2 mixed oxide
作者: Li, Huaju2;  Qi, Gongshin1;  Tana2;  Zhang, Xiaojing2;  Huang, Xiumin2;  Li, Wei1;  Shen, Wenjie2
通讯作者: WeiLi ;  申文杰
关键词: Mn0.6Ce0.4O2 mixed oxide ;  Solid solution ;  Ethanol oxidation ;  Molecular oxygen ;  Activation
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2011-03-14
DOI: 10.1016/j.apcatb.2011.01.008
卷: 103, 期:1-2, 页:54-61
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 501
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
摘要: Low-temperature oxidation of ethanol over a Mn0.6Ce0.4O2 mixed oxide
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A Mn0.6Ce0.4O2 mixed oxide exhibited rather high activity and stability for ethanol oxidation. Complete conversion of ethanol to CO2 was obtained at a temperature as low as 463 K and the activity maintained for 120 h on-stream without obvious deactivation. The Mn0.6Ce0.4O2 catalyst showed higher ethanol oxidation rate and better selectivity to CO2 which was even superior to a Pt/Al2O3 catalyst. Temperature-programmed surface reaction and spectroscopic studies have revealed that ethoxy species were formed immediately upon ethanol adsorption on the catalyst at room temperature. These intermediates were further oxidized to acetate and carbonate species, and finally converted to CO2 at elevated temperatures. The effective activation of molecule oxygen over the Mn0.6Ce0.4O2 solid solution plays an essential role in determining the catalytic performance. Oxygen transfer from molecular oxygen to MnO2 active sites through CeO2 in the solid solution realized the effective activation of molecular oxygen. At lower temperatures, the oxidation of ethanol mainly produced acetaldehyde, and the direct oxidation of ethanol to CO2 became the major route at higher temperatures, depending on the activation of molecular oxygen. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: COMBUSTION METHOD ;  VOC OXIDATION ;  CATALYSTS ;  FORMALDEHYDE ;  NANOTUBES ;  KINETICS ;  ROUTE ;  IR
语种: 英语
WOS记录号: WOS:000288884500007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115460
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.Gen Motors R&D Ctr, Warren, MI 48090 USA
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, Huaju,Qi, Gongshin,Tana,et al. Low-temperature oxidation of ethanol over a Mn0.6Ce0.4O2 mixed oxide[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2011,103(1-2):54-61.
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