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Abstract:
We report results of electron spectroscopic measurements, i.e., LEED, EELS, ARUPS, XPS, and NEXAFS on NO, and NO2 adsorbed on a thin Cr2O3 film with (111) orientation grown on top of a Cr(110) single-crystal surface via an oxidation procedure. It is shown that the Cr2O3(111) surface is likely to consist of Cr-terminated and O-terminated terraces and that the Cr-atoms located within the oxide surface are in oxidation states different from the bulk. Our results indicate that these sites are involved in the dissociation of NO2 at rather low temperature to yield adsorbed NO and adsorbed oxygen.
