Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 989-996 |
| Seitenumfang | 8 |
| Fachzeitschrift | Journal of Electron Spectroscopy and Related Phenomena |
| Jahrgang | 114-116 |
| Publikationsstatus | Veröffentlicht - 8 März 2001 |
| Veranstaltung | 8th International Conference on Electronic Spectroscopy and Structure (ICESS-8) - Berkeley, CA, USA Dauer: 8 Aug. 2000 → 12 Aug. 2000 |
Abstract
The spatial distribution of potassium under reaction conditions on a composite Pt/Rh catalyst has been studied employing photoelectron spectromicroscopy as in situ method during the H2+O2 reaction. The composite catalyst consisted of a 70×70 μm2 Pt domain on a Rh(110) surface predosed with a submonolayer coverage of potassium. This catalyst was exposed to an O2+H2 atmosphere in the 10-7 mbar range. The combination of chemical specific imaging with a spatial resolution of 0.12 μm and micro-spot spectroscopy provided direct evidence for lateral re-distribution of potassium into a stationary concentration pattern under reaction conditions. The identity of the adsorbed species in the pattern and the changes in the chemical state of the substrate were determined.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Strahlung
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Chemie (insg.)
- Spektroskopie
- Chemie (insg.)
- Physikalische und Theoretische Chemie
Zitieren
- Standard
- Harvard
- Apa
- Vancouver
- BibTex
- RIS
in: Journal of Electron Spectroscopy and Related Phenomena, Jahrgang 114-116, 08.03.2001, S. 989-996.
Publikation: Beitrag in Fachzeitschrift › Konferenzaufsatz in Fachzeitschrift › Forschung › Peer-Review
}
TY - JOUR
T1 - Spatial variations of the interface composition during surface chemical reactions
AU - Günther, S.
AU - Marbach, H.
AU - Hoyer, R.
AU - Imbihl, R.
AU - Gregoratti, L.
AU - Kiskinova, M.
N1 - Funding Information: The excellent technical support of D. Lonza is greatly acknowledged. This work was supported by Sincrotrone Trieste SCpA and partially by the EEC contract # ERBFMGECT950022.
PY - 2001/3/8
Y1 - 2001/3/8
N2 - The spatial distribution of potassium under reaction conditions on a composite Pt/Rh catalyst has been studied employing photoelectron spectromicroscopy as in situ method during the H2+O2 reaction. The composite catalyst consisted of a 70×70 μm2 Pt domain on a Rh(110) surface predosed with a submonolayer coverage of potassium. This catalyst was exposed to an O2+H2 atmosphere in the 10-7 mbar range. The combination of chemical specific imaging with a spatial resolution of 0.12 μm and micro-spot spectroscopy provided direct evidence for lateral re-distribution of potassium into a stationary concentration pattern under reaction conditions. The identity of the adsorbed species in the pattern and the changes in the chemical state of the substrate were determined.
AB - The spatial distribution of potassium under reaction conditions on a composite Pt/Rh catalyst has been studied employing photoelectron spectromicroscopy as in situ method during the H2+O2 reaction. The composite catalyst consisted of a 70×70 μm2 Pt domain on a Rh(110) surface predosed with a submonolayer coverage of potassium. This catalyst was exposed to an O2+H2 atmosphere in the 10-7 mbar range. The combination of chemical specific imaging with a spatial resolution of 0.12 μm and micro-spot spectroscopy provided direct evidence for lateral re-distribution of potassium into a stationary concentration pattern under reaction conditions. The identity of the adsorbed species in the pattern and the changes in the chemical state of the substrate were determined.
UR - http://www.scopus.com/inward/record.url?scp=0342592323&partnerID=8YFLogxK
U2 - 10.1016/S0368-2048(00)00262-0
DO - 10.1016/S0368-2048(00)00262-0
M3 - Conference article
AN - SCOPUS:0342592323
VL - 114-116
SP - 989
EP - 996
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
SN - 0368-2048
T2 - 8th International Conference on Electronic Spectroscopy and Structure (ICESS-8)
Y2 - 8 August 2000 through 12 August 2000
ER -