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Initial oxidation of the Rh(110) surface: Ordered adsorption and surface oxide structures (Articolo in rivista)

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Label

Initial oxidation of the Rh(110) surface: Ordered adsorption and surface oxide structures (Articolo in rivista) (literal)

Anno

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Alternative label

Dri, C (1,2); Africh, C (1,2); Esch, F (2); Comelli, G (1,2); Dubay, O (3); Kohler, L (3); Mittendorfer, F (3); Kresse, G (3); Dudin, P (4); Kiskinova, M (4) (2006)
Initial oxidation of the Rh(110) surface: Ordered adsorption and surface oxide structures
in The Journal of chemical physics; American Institute of Physics, Melville [NY] (Stati Uniti d'America)
(literal)

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Dri, C (1,2); Africh, C (1,2); Esch, F (2); Comelli, G (1,2); Dubay, O (3); Kohler, L (3); Mittendorfer, F (3); Kresse, G (3); Dudin, P (4); Kiskinova, M (4) (literal)

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Rivista

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Note

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(1) Univ Trieste, Dept Phys and Ctr Excellence Nanostructed Mat, I-34127 Trieste, Italy; (2) CNR, INFM, Lab TASC, I-34012 Trieste, Italy; (3) Institut für Materialphysik, Universität Wien, A-1090 Wien, Austria; (4) Sincrotrone Trieste, I-34012 Trieste, Italy (literal)

Titolo

Initial oxidation of the Rh(110) surface: Ordered adsorption and surface oxide structures (literal)

Abstract

The initial oxidation of the Rh(110) surface was studied by scanning tunneling microscopy, core level spectroscopy, and density functional theory. The experiments were carried out exposing the Rh(110) surface to molecular or atomic oxygen at temperatures in the 500-700 K range. In molecular oxygen ambient, the oxidation terminates at oxygen coverage close to a monolayer with the formation of alternating islands of the (10x2) one-dimensional surface oxide and (2x1)p2mg adsorption phases. The use of atomic oxygen facilitates further oxidation until a structure with a c(2x4) periodicity develops. The experimental and theoretical results reveal that the c(2x4) structure is a 'surface oxide' very similar to the hexagonal O-Rh-O trilayer structures formed on the Rh(111) and Rh(100) substrates. Some of the experimentally found adsorption phases appear unstable in the phase diagram predicted by thermodynamics, which might reflect kinetic hindrance. The structural details, core level spectra, and stability of the surface oxides formed on the three basal planes are compared with those of the bulk RhO2 and Rh2O3. (literal)

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