Details
| Original language | English |
|---|---|
| Pages (from-to) | 207-212 |
| Number of pages | 6 |
| Journal | Chemical physics letters |
| Volume | 364 |
| Issue number | 3-4 |
| Early online date | 13 Sept 2002 |
| Publication status | Published - 4 Oct 2002 |
Abstract
The spatial distribution of potassium on a Rh(110) surface during the catalytic O2 + H2 reaction is investigated employing scanning photoelectron microscopy (SPEM) and photoelectron emission microscopy (PEEM) as spatially resolving in situ methods. Mass transport of potassium with the reaction fronts is observed leading to a slowing down of the fronts and to time-dependent concentration profiles. Differences in the mobility and in the bonding strength of potassium on the 'reduced' and on the oxygen covered surface are shown to be the key factors for the enrichment of potassium in the front region.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Chemical physics letters, Vol. 364, No. 3-4, 04.10.2002, p. 207-212.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Mass transport of alkali metal in reaction fronts on a catalytic metal surface
AU - Marbach, H.
AU - Hinz, M.
AU - Günther, S.
AU - Gregoratti, L.
AU - Kiskinova, M.
AU - Imbihl, R.
PY - 2002/10/4
Y1 - 2002/10/4
N2 - The spatial distribution of potassium on a Rh(110) surface during the catalytic O2 + H2 reaction is investigated employing scanning photoelectron microscopy (SPEM) and photoelectron emission microscopy (PEEM) as spatially resolving in situ methods. Mass transport of potassium with the reaction fronts is observed leading to a slowing down of the fronts and to time-dependent concentration profiles. Differences in the mobility and in the bonding strength of potassium on the 'reduced' and on the oxygen covered surface are shown to be the key factors for the enrichment of potassium in the front region.
AB - The spatial distribution of potassium on a Rh(110) surface during the catalytic O2 + H2 reaction is investigated employing scanning photoelectron microscopy (SPEM) and photoelectron emission microscopy (PEEM) as spatially resolving in situ methods. Mass transport of potassium with the reaction fronts is observed leading to a slowing down of the fronts and to time-dependent concentration profiles. Differences in the mobility and in the bonding strength of potassium on the 'reduced' and on the oxygen covered surface are shown to be the key factors for the enrichment of potassium in the front region.
UR - http://www.scopus.com/inward/record.url?scp=0037020219&partnerID=8YFLogxK
U2 - 10.1016/S0009-2614(02)01249-6
DO - 10.1016/S0009-2614(02)01249-6
M3 - Article
AN - SCOPUS:0037020219
VL - 364
SP - 207
EP - 212
JO - Chemical physics letters
JF - Chemical physics letters
SN - 0009-2614
IS - 3-4
ER -