Oxidation of amorphous Ni-Zr alloys studied by XPS, UPS, ISS and XRD
文献类型：期刊论文
| 作者 | Song, Z; Bao, X; Wild, U; Muhler, M; Ertl, G |
| 刊名 | applied surface science
 |
| 出版日期 | 1998-09-01 |
| 卷号 | 134期号:1-4页码:31-38 |
| 关键词 | amorphous Ni-Zr alloy oxidation catalysis |
| 英文摘要 | amorphous ni36zr64 and ni24zr76 alloys were treated under conditions close to those used for activating ni-zr alloys in catalytic reactions. the composition and the structure of the surface region were investigated by x-ray photoelectron spectroscopy (xps), ultraviolet photoelectron spectroscopy (ups), ion scattering spectroscopy (iss) and x-ray diffraction (xrd). the results show that exposing the amorphous alloys to 500 mbar o-2 at 523 k led to oxidized surfaces consisting of zirconia and different oxidic nickel species. on the oxidized ni24zr76 surface, only small amounts of nio and ni2o3 were found, while ni2o3 was detected as the major ni-containing species on the oxidized ni36zr64 surface. oxidation of ni in the alloys appeared to be inhibited by the presence of metallic zr and started only after complete oxidation of the surrounding zr. annealing the oxidized alloys to 773 k led to a reduction of the surface oxides. the liberated oxygen atoms presumably diffused into the bulk, releasing metallic ni. at the topmost layer, zirconia was reduced by carbon atoms originating from the bulk to form a zrc-like surface compound. the exchange of ni and zr atoms between the surface and the bulk was enhanced by the oxidation and the annealing. the preferential oxidation of zirconium, which attracts zr atoms from the bulk to the surface, provides the driving force for such processes. (c) 1998 elsevier science b.v. all rights reserved. |
| 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 |
| 关键词[WOS] | catalytic properties ; surface oxidation ; zirconium ; hydrogenation ; activation |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000075851300004 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/138197]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.MPG, Fritz Haber Inst, D-14195 Berlin, Germany |
| 推荐引用方式 GB/T 7714 | Song, Z,Bao, X,Wild, U,et al. Oxidation of amorphous Ni-Zr alloys studied by XPS, UPS, ISS and XRD[J]. applied surface science,1998,134(1-4):31-38. |
| APA | Song, Z,Bao, X,Wild, U,Muhler, M,&Ertl, G.(1998).Oxidation of amorphous Ni-Zr alloys studied by XPS, UPS, ISS and XRD.applied surface science,134(1-4),31-38. |
| MLA | Song, Z,et al."Oxidation of amorphous Ni-Zr alloys studied by XPS, UPS, ISS and XRD".applied surface science 134.1-4(1998):31-38. |
入库方式： OAI收割
来源：大连化学物理研究所
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