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题名: Oxidative steam reforming of methanol on Ce0.9Cu0.1OY catalysts prepared by deposition-precipitation, coprecipitation, and complexation-combustion methods
作者: Shan, WJ;  Feng, ZC;  Li, ZL;  Jing, Z;  Shen, WJ;  Can, L
关键词: Ce0.9Cu0.1OY ;  solid solution ;  redox properties and oxidative stream reforming of methanol
刊名: JOURNAL OF CATALYSIS
发表日期: 2004-11-15
DOI: 10.1016/j.jcat.2004.07.010
卷: 228, 期:1, 页:206-217
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, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The production of hydrogen from oxidative steam reforming of methanol has been tested for Ce0.9Cu0.(1)Ogamma catalysts. The catalysts were prepared by deposition-precipitation (dp), coprecipitation (cp), and complexation-combustion (cc) methods. These catalysts were characterized using BET, TEM, X-ray diffraction (XRD), and Raman spectroscopy. A solid solution was formed in the Ce0.9Cu0.(1)Ogamma prepared by complexation-combustion. The incorporation of Cu atoms into CeO2 lattice leads to an increase of oxygen vacancy. XPS results indicated that the Cu+ is the main Cu species for the Ce(0.9)Cu(0.1)Ogamma-cc sample and the synergistic function between Cu2+/Cu+ and Ce4+/Ce3+ occurred in the redox cycle, which is the reason for lower reduction temperatures and improved redox properties as shown in TPR profiles. In the case of the Ce(0.9)Cu(0.1)Ogamma-cp and Ce(0.9)Cu(0.1)Ogamma-dp samples, most CuO dispersed on the CeO2; the poor interaction between CuO and CeO2 does not affect redox properties of CeO2. Methanol conversions higher than 85% with 90% hydrogen yield were obtained for Ce(0.9)Cu(0.1)Ogamma-cc from the oxidative steam reforming of methanol at 240degreesC. However, the catalysts prepared by coprecipitation and the deposition-precipitation method showed methanol conversion lower than 30% at 240degreesC, and less than 60% even at 360degreesC. The high catalytic activity of Ce(0.1)Cu(0.1)Ogamma-cc is mainly related to the formation of solid solution and the improved redox properties. (C) 2004 Published by Elsevier Inc.
关键词[WOS]: OXIDE COMPOSITE CATALYSTS ;  CARBON-MONOXIDE OXIDATION ;  HIGH-ENERGY DIFFRACTION ;  FUEL-CELLS ;  CUZNAL(ZR)-OXIDE CATALYSTS ;  SOLID-SOLUTIONS ;  X-RAY ;  SELECTIVE PRODUCTION ;  RAMAN-SPECTROSCOPY ;  REDOX PROPERTIES
语种: 英语
WOS记录号: WOS:000224756800021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139603
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

Recommended Citation:
Shan, WJ,Feng, ZC,Li, ZL,et al. Oxidative steam reforming of methanol on Ce0.9Cu0.1OY catalysts prepared by deposition-precipitation, coprecipitation, and complexation-combustion methods[J]. JOURNAL OF CATALYSIS,2004,228(1):206-217.
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