Details
| Original language | English |
|---|---|
| Pages (from-to) | 989-996 |
| Number of pages | 8 |
| Journal | Journal of Electron Spectroscopy and Related Phenomena |
| Volume | 114-116 |
| Publication status | Published - 8 Mar 2001 |
| Event | 8th International Conference on Electronic Spectroscopy and Structure (ICESS-8) - Berkeley, CA, USA Duration: 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 subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Radiation
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Spectroscopy
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 114-116, 08.03.2001, p. 989-996.
Research output: Contribution to journal › Conference article › Research › 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 -