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题名: XPS and XRD studies of fresh and sulfided Mo2N
作者: Wei, ZBZ;  Grange, P;  Delmon, B
关键词: passivation ;  sulfidation ;  surface composition ;  Mo2N ;  XPS
刊名: APPLIED SURFACE SCIENCE
发表日期: 1998-09-01
卷: 135, 期:1-4, 页:107-114
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Coatings & Films ;  Physics, Applied ;  Physics, Condensed Matter
研究领域[WOS]: Chemistry ;  Materials Science ;  Physics
英文摘要: Mo surface species of molybdenum nitride and their changes under sulfiding conditions were investigated by XRD and XPS. Mo2N was synthesized by temperature-programmed reaction of MoO3, with NH3. The decomposition of the Mo3d spectra gave a Mo3d doubler which corresponded to Modelta+ (2 less than or equal to delta < 4), Mo4+ and Mo5+ Or Mo6+ species. The BE of the Mo species of passivated Mo2N shifted to higher energy level compared with the freshly prepared Mo2N due to the oxidation of Mo nitride during passivation. When Mo2N was contacted for 4 h with a 15% H2S-H-2 mixture at 400 degrees C, the XRD spectra did not reveal any new phase, which indicates a high stability of Mo2N against sulfidation, but XPS data showed the presence of sulfur, including S-0 and S2- species, and a decrease of the N/Mo atomic ratio revealed some changes in surface composition. More than one monolayer of Mo2N was transformed to sulfide. It is probable that the oxygen incorporated during passivation reacted with sulfur and formed a thin layer of molybdenum sulfide on the Mo2N surface. (C) 1998 Elsevier Science B.V. All rights reserved.
关键词[WOS]: SUPPORTED MOLYBDENUM NITRIDE ;  MEAN FREE PATHS ;  HYDRODENITROGENATION CATALYSTS ;  CARBIDE CATALYSTS ;  SURFACE-AREA ;  HYDRODESULFURIZATION ;  QUINOLINE ;  TUNGSTEN ;  SOLIDS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000076267100016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/86375
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.Univ Catholique Louvain, Unite Catalyse & Chim Mat Divises, B-1348 Louvain, Belgium

Recommended Citation:
Wei, ZBZ,Grange, P,Delmon, B. XPS and XRD studies of fresh and sulfided Mo2N[J]. APPLIED SURFACE SCIENCE,1998,135(1-4):107-114.
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