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题名: Surface species and the stability of gamma-Mo2N
作者: Wei, ZB;  Xin, Q;  Grange, P;  Delmon, B
关键词: molybdenum nitride ;  surface species ;  stability ;  TPD-MS ;  XRD ;  XPS
刊名: SOLID STATE IONICS
发表日期: 1997-11-01
卷: 101, 页:761-767
收录类别: ISTP ;  SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Condensed Matter
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The surface species of passivated and nonpassivated Mo2N end their stability at elevated temperature in various environments have been investigated by thermal programmed desorption with mass spectrometry (TPD-MS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results demonstrate that two types of NHx and H species remain on fresh Mo2N, and a small amount of weakly adsorbed NHx species is present on passivated Mo2N. During heating at 1000 degrees C in He, fresh Mo2N transforms first from gamma-Mo2N to beta-Mo2N and then decomposes to metallic Mo. No obvious change of the crystalline phase occurs for passivated Mo2N before its decomposition or reduction. The XRD spectra showed a high stability of the Mo2N bulk structure against sulphidation. XPS data indicated that some changes of the surface composition occurred in sulphided Mo2N. Oxygen incorporated during passivation reacted with sulphur and formed a thin layer molybdenum of sulphide covering the nitride surface.
关键词[WOS]: TRANSITION-METAL CARBIDES ;  MOLYBDENUM NITRIDE ;  NMR-SPECTROSCOPY ;  HYDRODENITROGENATION ;  HYDRODESULFURIZATION ;  HYDROGENATION ;  CATALYSIS ;  QUINOLINE ;  TUNGSTEN ;  MO2N
语种: 英语
WOS记录号: WOS:000071198600017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142815
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
2.Catholic Univ Louvain, Unite Catalyse & Chim Mat Divises, B-1348 Louvain, Belgium

Recommended Citation:
Wei, ZB,Xin, Q,Grange, P,et al. Surface species and the stability of gamma-Mo2N[J]. SOLID STATE IONICS,1997,101:761-767.
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