A photoelectron spectroscopic observation of iron surfaces exposed to N2, N2O,NO, NO2 and air at 200 torr or 1 atm |
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Authors: | Fumihiro Honda Kichinosuke Hirokawa |
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Institution: | The Research Institute for Iron, Steel and Other Metals, Tohoku University, Katahira, Sendai Japan |
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Abstract: | Photoelectron spectra from core levels are presented for adsorption of nitrogen-containing gases at 200 torr or 1 atm on iron surfaces. Assignments of each band and the adsorption process are discussed. On the substrate at normal temperature, each gas forms nitride and nitrogen oxide groups (NO, NO2 and NO3) which appear at 398.6, 400.0, 404.5 and 407.1 eV, respectively. The relative intensifies of each species depend on the gases adsorbed. NO and NO2 are considered to dissociate on the surface and the oxygen atom adsorb preferentially. The oxygen on the surface can be considered to contribute to the formation of each surface ligand. |
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