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题名: Temperature-programmed surface reaction study on C-2-oxygenate synthesis over SiO2 and nanoporous zeolitic material supported Rh-Mn catalysts
作者: Ma, HT;  Yuan, ZY;  Wang, Y;  Bao, XH
关键词: temperature-programmed surface reaction (TPSR) ;  temperature-programmed reaction (TPR) ;  TPD ;  Rh-Mn-based catalyst ;  C-2-oxygenates
刊名: SURFACE AND INTERFACE ANALYSIS
发表日期: 2001-08-01
卷: 32, 期:1, 页:224-227
收录类别: ISTP ;  SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Temperature-programmed surface reaction (TPSR), temperature-programmed reaction (TPR) and temperature-programmed desorption (TPD) were used to study the synthesis Of C-2-oxygenates from syngas over Rh-Mn-based catalysts supported on amorphous silica and mesoporous MCM-41 supports. Both TPD and TPSR reveal the existence of several different kinds of CO species on the catalyst surface in the course of the catalytic reaction (linear, geminal, bridged and tilt-adsorbed CO species) but only the bridged form and tilt-adsorbed CO species are the precursors for CO dissociation and the formation of C-2-oxygenates. The formation temperature of acetaldehyde is higher than that of ethanol, which suggests that they may be formed via different mechanisms. The ethanol formation activity over the Rh-Mn/MCM-41 catalyst is lower than that over the Rh-Mn/SiO2, which suggests that the number of active sites for ethanol formation are fewer on the surface of Rh-Mn/MCM-41. However, the acetaldehyde formation activities are almost identical for the Rh-Mn catalysts supported on amorphous SiO2 and MCM-41, meaning that acetaldehyde and ethanol might be formed on different active sites. Copyright (C) 2001 John Wiley & Sons, Ltd.
关键词[WOS]: CARBON-MONOXIDE HYDROGENATION ;  RH/SIO2 CATALYSTS ;  SIO2-SUPPORTED RH ;  MECHANISM ;  RHODIUM ;  ACETALDEHYDE ;  CONVERSION ;  PROMOTER ;  PRESSURE ;  ETHANOL
语种: 英语
WOS记录号: WOS:000170551800049
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138967
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, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Inst Phys, Beijing Lab Electron Microscopy, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China

Recommended Citation:
Ma, HT,Yuan, ZY,Wang, Y,et al. Temperature-programmed surface reaction study on C-2-oxygenate synthesis over SiO2 and nanoporous zeolitic material supported Rh-Mn catalysts[J]. SURFACE AND INTERFACE ANALYSIS,2001,32(1):224-227.
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