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Surface species and the stability of gamma-Mo2N
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
1997-11-01
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
关键词[WOS]TRANSITION-METAL CARBIDES ; MOLYBDENUM NITRIDE ; NMR-SPECTROSCOPY ; HYDRODENITROGENATION ; HYDRODESULFURIZATION ; HYDROGENATION ; CATALYSIS ; QUINOLINE ; TUNGSTEN ; MO2N
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.
语种英语
WOS记录号WOS:000071198600017
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142815
专题中国科学院大连化学物理研究所
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
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Wei, ZB,Xin, Q,Grange, P,et al. Surface species and the stability of gamma-Mo2N[J]. SOLID STATE IONICS,1997,101:761-767.
APA Wei, ZB,Xin, Q,Grange, P,&Delmon, B.(1997).Surface species and the stability of gamma-Mo2N.SOLID STATE IONICS,101,761-767.
MLA Wei, ZB,et al."Surface species and the stability of gamma-Mo2N".SOLID STATE IONICS 101(1997):761-767.
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