物理化学学报 >> 1986, Vol. 2 >> Issue (01): 1 -5 .doi: 10.3866/PKU.WHXB19860101

研究论文    下一篇

银表面上吸附氧的XPS研究

董树忠; 包信和; 邓景发   

  1. 复旦大学现代物理研究所; 复旦大学化学系
  • 收稿日期:1984-12-20 修回日期:1985-07-10 发布日期:1986-02-15

XPS STUDY OF ADSORPTION OF OXYGEN ON SILVER

Dong Shuzhong; Bao Xinhe; Deng Jingfa   

  1. Fudan University, Institute of Modern Physics; Fudan University, Chemistry Department
  • Received:1984-12-20 Revised:1985-07-10 Published:1986-02-15

摘要: 本文用XPS研究了银表面上氧的吸附。结果表明, 在室温低压下, 氧在银表面上存在各种吸附态, 它们随氧吸附量增长过程而变化。

Abstract: The adsorption of oxygen on silver has been studied by XPS. The results indicate that the surface pretreatment method may effect the adsorption ability of oxygen on silver.It is shown that at room temperature and low p_(O_2)(≤10~(-5)Pa) three adsorption states of oxygen have existed on surface and their Ols binding energies are 528.2, 529.7 and 532.2 eV respectively, corresponding to two different atomic and one molecular adsorption species. We find that one of the atomic oxygen species (E_BCOls=528.2 eV) may transform to another one (E_B=529.7 eV) when the exposure of oxygen increases. At larger exposure, some oxygen atoms have entered the bulk of silver and its E_B(O1s)=530.2 eV. According to the XPS difference spectra of valence band, the resonance of the adsorbate appears at 2.8—3.0 eV and 9.0 eV bolow E_F, which are similar to the results of UPS. It is suggested that the atomic and molecular adsorption species of oxygen coexist on silver surface.