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题名: Manganese promoting effects on the Co-Ce-Zr-O-x nano catalysts for methane dry reforming with carbon dioxide to hydrogen and carbon monoxide
作者: Wang, Ning1;  Chu, Wei1;  Zhang, Tao2;  Zhao, Xiu-Song3
关键词: Nano cobalt-composite catalyst ;  Mn doping ;  CeO2-ZrO2 ;  Oxygen mobility ;  Methane dry reforming with CO2 ;  High catalytic performance
刊名: CHEMICAL ENGINEERING JOURNAL
发表日期: 2011-06-01
DOI: 10.1016/j.cej.2010.12.042
卷: 170, 期:2-3, 页:457-463
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: The Mn doping nanocrystalline Co-Ce-Zr-O-x catalysts were prepared by the co-precipitation method and characterized by various physico-chemical characterization techniques such as X-ray diffraction (XRD), temperature- programmed reduction (TPR), O-2 temperature-programmed desorption (O-2-TPD). X-ray photoelectron spectroscopy (XPS) and temperature-programmed hydrogenation (TPH). Their catalytic performances for methane reforming with CO2 to hydrogen and carbon monoxide were investigated. Adding Mn remarkably enhanced the catalytic activity and stability of the Co-Ce-Zr-O-x catalyst. The highest catalytic activity and long-term stability was obtained when the molar ratio of Mn/(Ce + Zr + Mn) was 10%. The improved catalytic behavior was closely related to the surface oxygen species and oxygen mobility. In comparison with that of Co-Ce-Zr-O-x catalyst, the migration of bulk lattice oxygen species became easier, and the content of surface oxygen species was higher for the Mn-doped nanocrystalline Co-Ce-Zr-O-x samples. TPH characterization showed that the surface coke species could be easily oxidized into COx for the Mn-doped nano cobalt-composite catalyst due to the higher amount of mobile oxygen. The Mn incorporation promoted the dispersion of the nano-sized CoOx crystallites. In comparison with the impregnated samples, CoOx species dispersed better in the co-precipitated catalysts. (C) 2011 Published by Elsevier B.V.
关键词[WOS]: CEO2-ZRO2 SOLID-SOLUTIONS ;  OXYGEN STORAGE CAPACITY ;  SYNTHESIS GAS ;  OXIDE CATALYSTS ;  REDOX BEHAVIOR ;  CERIA-ZIRCONIA ;  CE/ZR RATIO ;  REDUCTION ;  OXIDATION ;  SURFACE
语种: 英语
WOS记录号: WOS:000292947200014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142598
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.Sichuan Univ, Dept Chem Engn, Chengdu 610065, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore

Recommended Citation:
Wang, Ning,Chu, Wei,Zhang, Tao,et al. Manganese promoting effects on the Co-Ce-Zr-O-x nano catalysts for methane dry reforming with carbon dioxide to hydrogen and carbon monoxide[J]. CHEMICAL ENGINEERING JOURNAL,2011,170(2-3):457-463.
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