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题名: FT-IR spectroscopic studies of thiophene adsorption and reactions on Mo2N/gamma-Al2O3 catalysts
作者: Wu, ZL;  Li, C;  Wei, ZB;  Ying, PL;  Xin, Q
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2002-02-07
DOI: 10.1021/jp011577l
卷: 106, 期:5, 页:979-987
收录类别: 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: The adsorption and reactions behaviors of thiophene on reduced passivated and nitrided Mo2N/gamma-Al2O3 catalysts have been studied by in situ FT-IR spectroscopy at temperatures from room temperature to 673 K. Thiophene mainly adsorbs on the cus Mo sites of the two catalysts surfaces, and its adsorption mode is determined to be eta(1)(S). Thiophene alone shows no reaction on the two catalysts even at 673 K, while in the presence of H-2, it becomes reactive initially at 573 and 373 K on reduced passivated and nitrided Mo catalysts, respectively, producing a surface a-bonded butene species that is confirmed by the adsorption of 1-butene, cis- and trans-2-butenes, and 1,3-butadiene on the catalysts. Adsorption of CO clearly shows that the catalyst surfaces become sulfided completely with a treatment of thiophene/H-2 at temperatures higher than 573 K. The surface sulfidation together with the sigma-bonded C-4 species may play a role in the deactivation of the nitride catalysts for the HDS of thiophene. The high reactivity of thiophene toward nitrided Mo catalyst in the initial stage of thiophene HDS is ascribed to the high density of surface sites and unique electronic property of nitrided Mo for the activation of both H-2 and thiophene.
关键词[WOS]: MOLYBDENUM-DISULFIDE CATALYST ;  INELASTIC NEUTRON-SCATTERING ;  INFRARED-SPECTROSCOPY ;  NITRIDE CATALYSTS ;  HYDROGEN UPTAKE ;  METAL CARBIDES ;  MO CATALYSTS ;  HYDRODESULFURIZATION ;  ALUMINA ;  SURFACE
语种: 英语
WOS记录号: WOS:000173692100015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139127
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:
Wu, ZL,Li, C,Wei, ZB,et al. FT-IR spectroscopic studies of thiophene adsorption and reactions on Mo2N/gamma-Al2O3 catalysts[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2002,106(5):979-987.
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