Details
| Original language | English |
|---|---|
| Pages (from-to) | L903-L908 |
| Journal | Surface science |
| Volume | 339 |
| Issue number | 3 |
| Publication status | Published - 1 Oct 1995 |
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.
Keywords
- (LEED), Low-energy electron diffraction, Nitrogen, Oxygen, Rh(110)
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Materials Chemistry
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In: Surface science, Vol. 339, No. 3, 01.10.1995, p. L903-L908.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Structural analyses of the c(2 × 4)-N + 2O and the (2 × 1)-N phases on Rh(110) by low-energy electron diffraction
AU - Gierer, M.
AU - Mertens, F.
AU - Over, H.
AU - Ertl, G.
AU - Imbihl, R.
PY - 1995/10/1
Y1 - 1995/10/1
N2 - 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.
AB - 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.
KW - (LEED)
KW - Low-energy electron diffraction
KW - Nitrogen
KW - Oxygen
KW - Rh(110)
UR - http://www.scopus.com/inward/record.url?scp=0029393456&partnerID=8YFLogxK
U2 - 10.1016/0039-6028(95)80055-7
DO - 10.1016/0039-6028(95)80055-7
M3 - Article
AN - SCOPUS:0029393456
VL - 339
SP - L903-L908
JO - Surface science
JF - Surface science
SN - 0039-6028
IS - 3
ER -