Adsorption structures of NO on Pt(111) studied by the near edge X-ray absorption fine structure spectroscopy
- 作者：Zhu ; Ping ; Shimada ; Toru ; Kondoh ; Hiroshi ; Nakai ; Ikuyo ; Nagasaka ; Masanari ; Ohta ; Toshiaki
- 关键词：Nitrogen oxides ; Platinum ; Chemisorption ; X-ray photoelectron spectroscopy ; Near edge extended X-ray absorption fine structure (NEXAFS)
- 刊名：Surface Science
- 出版年：2004
- 期刊代码：104_00396028
- 类别：ch
- 出版时间：September 10, 2004
- 卷：565
- 期：2-3
- 页码：232-242
- 文件大小：417 K
摘要
Near edge X-ray absorption fine structure (NEXAFS) spectra were measured and analyzed to reveal the adsorption structures of NO on Pt(111) at 290 and 230 K. N K-edge NEXAFS spectra show a single 脧脧* resonance at 290 K, while they exhibit double peaks at 230 K. Simple polarization analysis cannot be applied to such a complicated system. Simulations based on the multiple scattering theory confirmed that NO is uniquely adsorbed at the hollow site at 290 K and there are two kinds of adsorption species at 230 K: one at atop site with a tilt angle of about 50脧脧 and another at hollow site with upright direction. They are in close agreement with the results by recent LEED I/V analysis.