The effect of tungsten additive on the surface characteristics of amorphous Ni-P alloy
Song, Z; Bao, XH; Muhler, M
KeywordOxidation Ni-p Alloy Catalytic Reactions
Indexed BySCI
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS Research AreaChemistry ; Materials Science ; Physics
AbstractThe 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.
WOS IDWOS:000081439400016
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Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
GB/T 7714
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.
APA Song, Z,Bao, XH,&Muhler, M.(1999).The effect of tungsten additive on the surface characteristics of amorphous Ni-P alloy.APPLIED SURFACE SCIENCE,148(3-4),241-247.
MLA Song, Z,et al."The effect of tungsten additive on the surface characteristics of amorphous Ni-P alloy".APPLIED SURFACE SCIENCE 148.3-4(1999):241-247.
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