Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 19149-19157 |
| Seitenumfang | 9 |
| Fachzeitschrift | Journal of Physical Chemistry C |
| Jahrgang | 115 |
| Ausgabenummer | 39 |
| Frühes Online-Datum | 15 Sept. 2011 |
| Publikationsstatus | Veröffentlicht - 6 Okt. 2011 |
Abstract
Upon exposure of ultrathin vanadium oxide layers on Rh(111) (θV ∼ 0.2 MLE) to the H2 + O2 reaction, we observe the reversible formation of stationary macroscopic stripe patterns caused by lateral redistribution of the vanadium oxide. These patterns are investigated in the 10-6 mbar range at around 750 K, employing LEEM (low energy electron microscopy), microprobe-LEED and microprobe-XPS. The stripe patterns evolve via several stages and structures: essentially, vanadium oxide nanoislands with a (√7 × √7)R19.1° structure are reduced from V+5 to V3+ and condense into a macroscopic (2 × - 2) oxide phase upon increasing p(H2). The orientation of the stripe patterns is determined by step bunches, which introduce a diffusional anisotropy. The stationary patterns are discussed within the concept of reactive phase separation.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Energie (insg.)
- Allgemeine Energie
- Chemie (insg.)
- Physikalische und Theoretische Chemie
- Werkstoffwissenschaften (insg.)
- Oberflächen, Beschichtungen und Folien
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in: Journal of Physical Chemistry C, Jahrgang 115, Nr. 39, 06.10.2011, S. 19149-19157.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Self-organization of ultrathin vanadium oxide layers on a Rh(111) surface during a catalytic reaction. Part II
T2 - A LEEM and spectromicroscopy study
AU - Lovis, Florian
AU - Hesse, Martin
AU - Locatelli, Andrea
AU - Menteş, Tevfik O.
AU - Niño, Miguel Á
AU - Lilienkamp, Gerhard
AU - Borkenhagen, Benjamin
AU - Imbihl, Ronald
PY - 2011/10/6
Y1 - 2011/10/6
N2 - Upon exposure of ultrathin vanadium oxide layers on Rh(111) (θV ∼ 0.2 MLE) to the H2 + O2 reaction, we observe the reversible formation of stationary macroscopic stripe patterns caused by lateral redistribution of the vanadium oxide. These patterns are investigated in the 10-6 mbar range at around 750 K, employing LEEM (low energy electron microscopy), microprobe-LEED and microprobe-XPS. The stripe patterns evolve via several stages and structures: essentially, vanadium oxide nanoislands with a (√7 × √7)R19.1° structure are reduced from V+5 to V3+ and condense into a macroscopic (2 × - 2) oxide phase upon increasing p(H2). The orientation of the stripe patterns is determined by step bunches, which introduce a diffusional anisotropy. The stationary patterns are discussed within the concept of reactive phase separation.
AB - Upon exposure of ultrathin vanadium oxide layers on Rh(111) (θV ∼ 0.2 MLE) to the H2 + O2 reaction, we observe the reversible formation of stationary macroscopic stripe patterns caused by lateral redistribution of the vanadium oxide. These patterns are investigated in the 10-6 mbar range at around 750 K, employing LEEM (low energy electron microscopy), microprobe-LEED and microprobe-XPS. The stripe patterns evolve via several stages and structures: essentially, vanadium oxide nanoislands with a (√7 × √7)R19.1° structure are reduced from V+5 to V3+ and condense into a macroscopic (2 × - 2) oxide phase upon increasing p(H2). The orientation of the stripe patterns is determined by step bunches, which introduce a diffusional anisotropy. The stationary patterns are discussed within the concept of reactive phase separation.
UR - http://www.scopus.com/inward/record.url?scp=80053465788&partnerID=8YFLogxK
U2 - 10.1021/jp206600q
DO - 10.1021/jp206600q
M3 - Article
AN - SCOPUS:80053465788
VL - 115
SP - 19149
EP - 19157
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 39
ER -