Structural analyses of the c(2 × 4)-N + 2O and the (2 × 1)-N phases on Rh(110) by low-energy electron diffraction

verfasst von: M. Gierer, F. Mertens, H. Over, G. Ertl, R. Imbihl
Abstract: The LEED analysis of the Rh(110)-(2 × 1)-N phase supports convincingly the RhN-added-row model revealing a RhN bond length of 1.91 ± 0.04 A ̊. The atomic geometry of c(2 × 4)-N + 2O on Rh(110) reflects the structural elements found in the pure N and O phases: The type of the Rh(110) surface reconstruction is induced by the oxygen adsorption, and a missing-row reconstruction analogous to the Rh(110)-(2 × 2)p2mg-2O surface is observed. Oxygen occupies the threefold-coordinated fcc site along the densily-packed rows. Nitrogen, however, causes the O network of the Rh(110)-(2 × 2)p2mg-2O to rearrange in order to provide N-adsorption sites which are maximal apart from the surrounding O atoms and, in addition, retains the local chemisorption geometry as compared with the pure (2 × 1)-N phase. Both requirements are met by shifting every second O-zigzag chain along the [11̄0] direction by a substrate lattice vector and by adsorbing N in the long-bridge site at the bottom of the (1 × 2) troughs.
Organisationseinheit(en): Institut für Physikalische Chemie und Elektrochemie
Externe Organisation(en): Fritz-Haber-Institut der Max-Planck-Gesellschaft
Typ: Artikel
Journal: Surface science
Band: 339
Seiten: L903-L908
ISSN: 0039-6028
Publikationsdatum: 01.10.1995
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Physik der kondensierten Materie, Oberflächen und Grenzflächen, Oberflächen, Beschichtungen und Folien, Werkstoffchemie
Elektronische Version(en): https://doi.org/10.1016/0039-6028(95)80055-7 (Zugang: Geschlossen)

BibTeX

@article{0eb18e05d799438eb681e17c878a0240,
title = "Structural analyses of the c(2 × 4)-N + 2O and the (2 × 1)-N phases on Rh(110) by low-energy electron diffraction",
abstract = "The LEED analysis of the Rh(110)-(2 × 1)-N phase supports convincingly the RhN-added-row model revealing a RhN bond length of 1.91 ± 0.04 A ̊. The atomic geometry of c(2 × 4)-N + 2O on Rh(110) reflects the structural elements found in the pure N and O phases: The type of the Rh(110) surface reconstruction is induced by the oxygen adsorption, and a missing-row reconstruction analogous to the Rh(110)-(2 × 2)p2mg-2O surface is observed. Oxygen occupies the threefold-coordinated fcc site along the densily-packed rows. Nitrogen, however, causes the O network of the Rh(110)-(2 × 2)p2mg-2O to rearrange in order to provide N-adsorption sites which are maximal apart from the surrounding O atoms and, in addition, retains the local chemisorption geometry as compared with the pure (2 × 1)-N phase. Both requirements are met by shifting every second O-zigzag chain along the [1{\=1}0] direction by a substrate lattice vector and by adsorbing N in the long-bridge site at the bottom of the (1 × 2) troughs.",
keywords = "(LEED), Low-energy electron diffraction, Nitrogen, Oxygen, Rh(110)",
author = "M. Gierer and F. Mertens and H. Over and G. Ertl and R. Imbihl",
year = "1995",
month = oct,
day = "1",
doi = "10.1016/0039-6028(95)80055-7",
language = "English",
volume = "339",
pages = "L903--L908",
journal = "Surface science",
issn = "0039-6028",
publisher = "Elsevier",
number = "3",
}