Surface segregation and oxidation of Pt3Ni(111) alloys under oxygen environment.
文献类型：期刊论文
| 作者 | Toyoshima, R.1; Lee, H. C.6; Kim, B. M.7; Jeong, C. K.7; Kondoh, H.1; Shimada, T.8; Mase, K.2; Mao, B.9; Liu, Z.9; Lee, H.5 |
| 刊名 | CATALYSIS TODAY
 |
| 出版日期 | 2016-02-01 |
| 卷号 | 260页码:3-7 |
| 关键词 | Ambient Pressure Xps Pt Alloys Metal Oxidation Dft Surface Segregationa |
| ISSN号 | 0920-5861 |
| DOI | 10.1016/j.cattod.2015.05.003 |
| 文献子类 | Article |
| 英文摘要 | Utilizing ambient pressure X-ray photoelectron spectroscopy (AP-XPS), the surface segregation and oxidation of Pt3Ni(1 1 1) alloys are investigated as a function of temperature and oxygen pressure. The in situ AP-XPS measurements of oxygen oxidation process show that the Pt "skin" surface is not stable under the exposure of oxygen pressure of 100 mTorr at room temperature. As the temperature and pressure are elevated, the formations of Ni2O3, NiOx, and NiO are observed on surface while Pt atom starts to reduce its adsorbed oxygen, which is a clear sign of surface segregation of Ni to surface. Upon the evacuation of oxygen gas, i.e. ultrahigh vacuum condition, both of NiOx and NiO oxide get reduced and Ni2O3 remains on the surface. The DFT calculation is employed to explain the formation of surface oxides under oxidation condition. (C) 2015 Elsevier B.V. All rights reserved. |
| WOS关键词 | AUGMENTED-WAVE METHOD ; REDUCTION ; PHOTOEMISSION ; ATOMS |
| WOS研究方向 | Chemistry ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000364865800002 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/171622]  |
| 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 |
| 通讯作者 | Li, W. X. |
| 作者单位 | 1.Keio Univ, Dept Chem, Tokyo, Japan 2.High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan 3.Gwangju Inst Sci & Technol, Ertl Ctr Electrochem & Catalysis, Gwangju, South Korea 4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 5.Sookmyung Womens Univ, Dept Chem, Seoul, South Korea 6.Gwangju Inst Sci & Technol, Sch Phys & Sci, Dept Phys & Photon Sci, Gwangju, South Korea 7.Hanyang Univ, Dept Appl Phys, ERICA, Seoul, South Korea 8.Hirosaki Univ, Fac Educ, Dept Sci, Aomori, Japan 9.Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA |
| 推荐引用方式 GB/T 7714 | Toyoshima, R.,Lee, H. C.,Kim, B. M.,et al. Surface segregation and oxidation of Pt3Ni(111) alloys under oxygen environment.[J]. CATALYSIS TODAY,2016,260:3-7. |
| APA | Toyoshima, R..,Lee, H. C..,Kim, B. M..,Jeong, C. K..,Kondoh, H..,...&Mun, B. S..(2016).Surface segregation and oxidation of Pt3Ni(111) alloys under oxygen environment..CATALYSIS TODAY,260,3-7. |
| MLA | Toyoshima, R.,et al."Surface segregation and oxidation of Pt3Ni(111) alloys under oxygen environment.".CATALYSIS TODAY 260(2016):3-7. |
入库方式： OAI收割
来源：大连化学物理研究所
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