Adsorption structures of NO on Pt(111) studied by the near edge X-ray absorption fine structure spectroscopy

作者：Zhu P; Shimada T; Kondoh H; Nakai I; Nagasaka M; Ohta T^*

来源：Surface Science, 2004, 565(2-3): 232-242.

DOI：10.1016/j.susc.2004.07.013

• nitrogen oxides
• platinum
• chemisorption
• X-ray photoelectron spectroscopy
• near edge extended X-ray absorption fine
• structure (NEXAFS)

Near edge X-ray absorption fine structure (NEXAFS) spectra were measured and analyzed to reveal the adsorption structures of NO on Pt(I 11) at 290 and 230 K. N K-edge NEXAFS spectra show a single pi* 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 50degrees and another at hollow site with upright direction. They are in close agreement with the results by recent LEED IIV analysis.

• 出版日期2004-9-10