期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 373, 期 7, 页码 601-608出版社
SPRINGER-VERLAG BERLIN
DOI: 10.1007/s00216-002-1362-3
关键词
X-ray photoelectron spectroscopy; valence band; iron oxides; cluster calculations; band structure calculations
The valence band and core-level X-ray photoelectron spectroscopy (XPS) of iron and its oxides are reported, and the valence band spectra interpreted by various calculation models. The paper focuses upon the valence band region, which shows significant differences between the metal and the following oxidized iron species: FeO, Fe3O4, alpha-Fe2O3, gamma-Fe2O3, alpha-FeOOH and gamma-FeOOH. The core region is of little analytical value as a means of distinguishing between these species, but the valence band region shows significant differences. These differences are consistent with spectra predicted by cluster and band structure calculations. Cluster calculations are valuable as a means for interpreting the spectra of iron oxides with multiple iron sites and defect characteristics.
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