Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 258-262 |
| Seitenumfang | 5 |
| Fachzeitschrift | Surface science |
| Jahrgang | 352-354 |
| Publikationsstatus | Veröffentlicht - 15 Mai 1996 |
Abstract
The formation of reaction fronts during the catalytic oxidation of CO on Pt(110) has been investigated with mirror electron microscopy (MEM). The reaction was studied in the 10-5 mbar range at T ≈ 430-450 K under conditions where spatio-temporal pattern formation occurs. Nucleation of reaction fronts was always found to take place at surface defects. While the CO front nucleates as a circular spot, the oxygen front first spreads out very rapidly along the [110] direction. Often, the reaction fronts fail to propagate away entirely from the defects, and instead a kind of breathing mode is observed. Rotating spiral waves can be identified, the cores of which are not attached to structural defects, but meander freely.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Physik und Astronomie (insg.)
- Oberflächen und Grenzflächen
- Werkstoffwissenschaften (insg.)
- Oberflächen, Beschichtungen und Folien
- Werkstoffwissenschaften (insg.)
- Werkstoffchemie
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in: Surface science, Jahrgang 352-354, 15.05.1996, S. 258-262.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Nucleation of chemical waves at structural defects
T2 - A mirror electron microscopy study of catalytic CO oxidation on Pt(110)
AU - Rose, K. C.
AU - Imbihl, R.
AU - Rausenberger, B.
AU - Rastomjee, C. S.
AU - Engel, W.
AU - Bradshaw, A. M.
N1 - Funding Information: This work has been supportedin part by the Fonds der ChemischenIn dustriea s well as by the DeutscheF orschungsgemeinschtahfrto ught he Son-derforschungsbere2ic9h0 .
PY - 1996/5/15
Y1 - 1996/5/15
N2 - The formation of reaction fronts during the catalytic oxidation of CO on Pt(110) has been investigated with mirror electron microscopy (MEM). The reaction was studied in the 10-5 mbar range at T ≈ 430-450 K under conditions where spatio-temporal pattern formation occurs. Nucleation of reaction fronts was always found to take place at surface defects. While the CO front nucleates as a circular spot, the oxygen front first spreads out very rapidly along the [110] direction. Often, the reaction fronts fail to propagate away entirely from the defects, and instead a kind of breathing mode is observed. Rotating spiral waves can be identified, the cores of which are not attached to structural defects, but meander freely.
AB - The formation of reaction fronts during the catalytic oxidation of CO on Pt(110) has been investigated with mirror electron microscopy (MEM). The reaction was studied in the 10-5 mbar range at T ≈ 430-450 K under conditions where spatio-temporal pattern formation occurs. Nucleation of reaction fronts was always found to take place at surface defects. While the CO front nucleates as a circular spot, the oxygen front first spreads out very rapidly along the [110] direction. Often, the reaction fronts fail to propagate away entirely from the defects, and instead a kind of breathing mode is observed. Rotating spiral waves can be identified, the cores of which are not attached to structural defects, but meander freely.
KW - Carbon monoxide
KW - Catalysis
KW - Low index single crystal surfaces
KW - Low-energy electron microscopy (LEEM)
KW - Models of non-linear phenomena
KW - Oxygen
KW - Platinum
KW - Surface chemical reaction
UR - http://www.scopus.com/inward/record.url?scp=0030141250&partnerID=8YFLogxK
U2 - 10.1016/0039-6028(95)01143-9
DO - 10.1016/0039-6028(95)01143-9
M3 - Article
AN - SCOPUS:0030141250
VL - 352-354
SP - 258
EP - 262
JO - Surface science
JF - Surface science
SN - 0039-6028
ER -