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题名: In-situ FT-IR study of CO hydrogenation to C-2 oxygenates over Rh-based catalysts
作者: Yin, HM;  Ding, YJ;  Luo, HY;  He, DP;  Xiong, JM;  Chen, WM;  Pan, ZD;  Lin, LW
关键词: rhodium-based catalyst ;  carbon monoxide ;  hydrogenation ;  C-2 oxygenate ;  in-situ infrared spectroscopy
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2004-07-01
卷: 25, 期:7, 页:547-550
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: In-situ FT-IR technique was employed to investigate CO adsorption and the changes of adsorbed species on the surface of Rh-based catalysts during CO hydrogenation. The result showed that only the linear CO was observed on Rh/SiO2, while linear CO and twin CO appeared on Rh-Mn-Li-Fe/SiO2, indicating that Rh dispersion on Rh-Mn-Li-Fe/SiO2 was higher than that on Rh/SiO2. In the IR spectra of CO hydrogenation under the conditions of 593 K and 3.0 MPa, the bands at 1 716, 1566, 1442, and 1 343 cm which were attributed to C-2 oxygenate precursors, were observed for Rh-Mn-Li-Fe/SiO2, while no band was detected for Rh/SiO2. CO was adsorbed mainly as linear CO on both the catalysts during CO hydrogenation. Correlating the FTIR results with the CO hydrogenation performance suggested that the linear CO might be mainly responsible for the formation of C-2 oxygenates. The high activity of Rh-Mn-Li-Fe/SiO2 was due to the fact that the existence of promoters weakened the C-O bond of adsorbed CO on the catalyst, promoted CO activation and favored the formation of C-2-oxygenate intermediates under the reaction conditions.
关键词[WOS]: HIGH-PRESSURE ;  SUPPORTED RHODIUM ;  SIO2-SUPPORTED RH ;  CONVERSION ;  INSITU ;  PROMOTER ;  SYNGAS
语种: 英语
WOS记录号: WOS:000223181200010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139348
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, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Yin, HM,Ding, YJ,Luo, HY,et al. In-situ FT-IR study of CO hydrogenation to C-2 oxygenates over Rh-based catalysts[J]. CHINESE JOURNAL OF CATALYSIS,2004,25(7):547-550.
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