Journal
MOSCOW UNIVERSITY CHEMISTRY BULLETIN
Volume 62, Issue 6, Pages 343-349Publisher
PLEIADES PUBLISHING INC
DOI: 10.3103/S0027131407060090
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Funding
- subprogram Development of the Potential of Higher Education [8051]
- Zamoraev Foundation
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Gold oxide films obtained on the surface of polycrystalline gold foil upon oxidation by oxygen activated by a high-frequency discharge have been studied by X-ray photoelectron spectroscopy. High-frequency O-2 activation affords oxide films more than 3-5 mu thick. As follows from Au4f spectra, the surface gold atoms are oxidized to the oxidation state +3. The Ols spectra have a composite shape and are decomposed into four components that characterize nonequivalent states of oxygen in the resulting oxide films. It is assumed that the two major oxygen states (E-b (O1s) = 529.0 and 530.0 eV) correspond to the oxygen atoms in two- and threedimensional gold oxide Au2O3, respectively. The oxygen states characterized by the higher binding energies (E-b (O1s) = 531.8 and 535.2 eV) likely correspond to molecular oxygen in peroxide and superoxide groups, respectively.
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