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Journal Article

Adsorption of molecular and atomic hydrogen on vacuum-cleaved V2O5(001)

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Tepper,  Bettina
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Richter,  Bodo
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Dupuis,  Anne-Claire
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Kuhlenbeck,  Helmut
Chemical Physics, Fritz Haber Institute, Max Planck Society;

Yarmo,  M. A. bin
Max Planck Society;

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Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Tepper, B., Richter, B., Dupuis, A.-C., Kuhlenbeck, H., Hucho, C., Schilbe, P., et al. (2002). Adsorption of molecular and atomic hydrogen on vacuum-cleaved V2O5(001). Surface science, 496(1-2), 64-72. doi:10.1016/S0039-6028(01)01607-7.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-1622-6
Abstract
The (001) surface of a vacuum-cleaved V2O5 single crystal has been studied using high-resolution electron energy loss spectroscopy (HREELS), UV-photoelectron spectroscopy angular resolved photoemission spectra (ARUPS) and X-ray photoelectron spectroscopy (XPS). Special emphasis was put onto the interaction with molecular and atomic hydrogen and the existence of hydroxyl groups on the surface. Dosage of atomic hydrogen induces reduction of the V2O5(001) surface as is obvious from the evolution of intensity near to the Fermi edge in the photoelectron spectra. Even after strong reduction no indications of OH groups could be observed in the spectra. Detailed inspection of the ARUPS and HREELS data and comparison with theory leads to the conclusion that the hydrogen induced defects on the surface are most likely missing bridging oxygen atoms whereas the terminal oxygen atoms of the vanadyl groups appear to be stable with respect to removal by atomic hydrogen.