Details
| Original language | English |
|---|---|
| Pages (from-to) | 166-172 |
| Number of pages | 7 |
| Journal | Journal of catalysis |
| Volume | 230 |
| Issue number | 1 |
| Early online date | 14 Jan 2005 |
| Publication status | E-pub ahead of print - 14 Jan 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.
Keywords
- Copper(110), Formaldehyde, Hysteresis, Methanol oxidation, Pressure gap, Stationary kinetics
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Journal of catalysis, Vol. 230, No. 1, 14.01.2005, p. 166-172.
Research output: Contribution to journal › Article › Research › 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 - 2005/1/14
Y1 - 2005/1/14
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 -