Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 166-172 |
| Seitenumfang | 7 |
| Fachzeitschrift | Journal of catalysis |
| Jahrgang | 230 |
| Ausgabenummer | 1 |
| Frühes Online-Datum | 14 Jan. 2005 |
| Publikationsstatus | Veröffentlicht - 15 Feb. 2005 |
Abstract
The steady-state kinetics of methanol oxidation over Cu(110) have been studied in the 10-7 to 10-3 mbar range. H2, H2O, and CO2 are found in addition to the main product formaldehyde. The reactive sticking coefficient of methanol reaches 0.2. A pronounced hysteresis is observed when the temperature is cycled. Our data indicate the presence of two rate maxima, one at ≈400-520 K and the other at ≈900 K. The amplitude of the low-temperature reactivity peak decreases with increasing total pressure, vanishing beyond 10-3 mbar. High oxygen partial pressures led to a poisoning of the reaction, which was apparently caused by the inhibitory effect of high oxygen coverage on methanol adsorption.
ASJC Scopus Sachgebiete
- Chemische Verfahrenstechnik (insg.)
- Katalyse
- Chemie (insg.)
- Physikalische und Theoretische Chemie
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in: Journal of catalysis, Jahrgang 230, Nr. 1, 15.02.2005, S. 166-172.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Low-pressure methanol oxidation over a Cu(110) surface under stationary conditions
T2 - (I) reaction kinetics
AU - Zhou, L.
AU - Günther, S.
AU - Imbihl, R.
N1 - Funding Information: This work was supported by the DFG under the priority program 1091 “Bridging the gap between ideal and real systems in heterogeneous catalysis.”
PY - 2005/2/15
Y1 - 2005/2/15
N2 - The steady-state kinetics of methanol oxidation over Cu(110) have been studied in the 10-7 to 10-3 mbar range. H2, H2O, and CO2 are found in addition to the main product formaldehyde. The reactive sticking coefficient of methanol reaches 0.2. A pronounced hysteresis is observed when the temperature is cycled. Our data indicate the presence of two rate maxima, one at ≈400-520 K and the other at ≈900 K. The amplitude of the low-temperature reactivity peak decreases with increasing total pressure, vanishing beyond 10-3 mbar. High oxygen partial pressures led to a poisoning of the reaction, which was apparently caused by the inhibitory effect of high oxygen coverage on methanol adsorption.
AB - The steady-state kinetics of methanol oxidation over Cu(110) have been studied in the 10-7 to 10-3 mbar range. H2, H2O, and CO2 are found in addition to the main product formaldehyde. The reactive sticking coefficient of methanol reaches 0.2. A pronounced hysteresis is observed when the temperature is cycled. Our data indicate the presence of two rate maxima, one at ≈400-520 K and the other at ≈900 K. The amplitude of the low-temperature reactivity peak decreases with increasing total pressure, vanishing beyond 10-3 mbar. High oxygen partial pressures led to a poisoning of the reaction, which was apparently caused by the inhibitory effect of high oxygen coverage on methanol adsorption.
KW - Copper(110)
KW - Formaldehyde
KW - Hysteresis
KW - Methanol oxidation
KW - Pressure gap
KW - Stationary kinetics
UR - http://www.scopus.com/inward/record.url?scp=13644263167&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2004.11.039
DO - 10.1016/j.jcat.2004.11.039
M3 - Article
AN - SCOPUS:13644263167
VL - 230
SP - 166
EP - 172
JO - Journal of catalysis
JF - Journal of catalysis
SN - 0021-9517
IS - 1
ER -