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题名: The effect of tungsten additive on the surface characteristics of amorphous Ni-P alloy
作者: Song, Z;  Bao, XH;  Muhler, M
关键词: oxidation ;  Ni-P alloy ;  catalytic reactions
刊名: APPLIED SURFACE SCIENCE
发表日期: 1999-07-01
卷: 148, 期:3-4, 页:241-247
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: The variation of surface compositions on amorphous Ni80.4W1.5P18.1 alloy by O-2 oxidation and H-2 reduction treatments have been studied by XPS, UPS and ISS. It shows that addition of tungsten in the amorphous Ni-P alloy leads to dramatic changes of the relating component distributions in the surface layers before and after these treatments. Oxidation of a Ni80.4W1.5P18.1 amorphous alloy in 1 bar of oxygen at 513 K caused a significant segregation of nickel in different oxide states at the surface. The subsequent reduction of the oxidized surface with I bar hydrogen at 553 K resulted in only a small portion of Ni and P being reduced into elemental states, while most of them was found to combine to form a kind of nickel phosphate compound. On the other hand, under the same conditions, the oxidation and reduction of a Ni80P20 alloy gave rise to metallic Ni and elemental P as the predominate species on the alloy surface. The addition of W in the amorphous alloy might act as nuclei for a favorable formation of the phosphate structure which was proposed to be an active species for hydrogen-relating catalytic reactions. (C) 1999 Elsevier Science B.V. All rights reserved.
关键词[WOS]: CATALYTIC MATERIAL ;  METAL-ALLOYS ;  HYDROGENATION ;  OXYGEN
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000081439400016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/86431
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.Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

Recommended Citation:
Song, Z,Bao, XH,Muhler, M. The effect of tungsten additive on the surface characteristics of amorphous Ni-P alloy[J]. APPLIED SURFACE SCIENCE,1999,148(3-4):241-247.
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