Details
| Original language | English |
|---|---|
| Pages (from-to) | 359-367 |
| Number of pages | 9 |
| Journal | Journal of catalysis |
| Volume | 235 |
| Issue number | 2 |
| Early online date | 29 Sept 2005 |
| Publication status | E-pub ahead of print - 29 Sept 2005 |
Abstract
The reactivity of metallic and oxidized copper surfaces in methanol oxidation was studied in the 10-2 mbar range. Transitions between the metallic surface and the two copper oxides, Cu2O and CuO, are being followed by the color changes of the sample and by ellipsometric measurements. Compared with a metallic copper surface, a partially oxidized copper surface has higher reactivity toward production of formaldehyde, whereas the deeply oxidized surface (CuO) shows a higher activity toward total oxidation to CO 2. Oxidation and reduction of the Cu surface are associated with a strong change in the degree of roughening and with spatial inhomogeneities, as demonstrated by photographic imaging and by ellipsometric microscopy.
Keywords
- Copper, Copper oxide, Ellipsometry, Formaldehyde, Methanol oxidation, Partial oxidation, Surface reactivity
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Journal of catalysis, Vol. 235, No. 2, 29.09.2005, p. 359-367.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Reactivity of oxidized copper surfaces in methanol oxidation
AU - Zhou, L.
AU - Günther, S.
AU - Moszynski, D.
AU - Imbihl, R.
N1 - Funding Information: This work was supported by the DFG through the priority program 1091, “Bridging the Gap Between Ideal and Real Systems in Heterogeneous Catalysis.”
PY - 2005/9/29
Y1 - 2005/9/29
N2 - The reactivity of metallic and oxidized copper surfaces in methanol oxidation was studied in the 10-2 mbar range. Transitions between the metallic surface and the two copper oxides, Cu2O and CuO, are being followed by the color changes of the sample and by ellipsometric measurements. Compared with a metallic copper surface, a partially oxidized copper surface has higher reactivity toward production of formaldehyde, whereas the deeply oxidized surface (CuO) shows a higher activity toward total oxidation to CO 2. Oxidation and reduction of the Cu surface are associated with a strong change in the degree of roughening and with spatial inhomogeneities, as demonstrated by photographic imaging and by ellipsometric microscopy.
AB - The reactivity of metallic and oxidized copper surfaces in methanol oxidation was studied in the 10-2 mbar range. Transitions between the metallic surface and the two copper oxides, Cu2O and CuO, are being followed by the color changes of the sample and by ellipsometric measurements. Compared with a metallic copper surface, a partially oxidized copper surface has higher reactivity toward production of formaldehyde, whereas the deeply oxidized surface (CuO) shows a higher activity toward total oxidation to CO 2. Oxidation and reduction of the Cu surface are associated with a strong change in the degree of roughening and with spatial inhomogeneities, as demonstrated by photographic imaging and by ellipsometric microscopy.
KW - Copper
KW - Copper oxide
KW - Ellipsometry
KW - Formaldehyde
KW - Methanol oxidation
KW - Partial oxidation
KW - Surface reactivity
UR - http://www.scopus.com/inward/record.url?scp=26444469010&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2005.08.020
DO - 10.1016/j.jcat.2005.08.020
M3 - Article
AN - SCOPUS:26444469010
VL - 235
SP - 359
EP - 367
JO - Journal of catalysis
JF - Journal of catalysis
SN - 0021-9517
IS - 2
ER -