Journal article
Effects of steps and defects on O2 dissociation on clean and modified Cu(100)
In
Surf. Sci
—
2003, Volume 538, Issue 3, pp. 233-239
Abstract
Dissociative chemisorption of O-2 on Cu(100), S/Cu(100) and Ag/Cu(100) surface alloy has been investigated by Auger electron spectroscopy (AES). A strong reduction in the initial O-2 chemisorption probability (S-0) from 0.05 to 7.4 x 10(-3) is observed already at an Ag coverage of 0.02 ML. Further Ag deposition results only in a moderate decrease in So.
Similar inhibition of O-2 dissociation is observed on S/Cu(100). It is concluded that at very low Ag coverages, the reduced reactivity of Ag/Cu(100) towards O-2 dissociation is primarily due to the steric blocking of the surface defects and that any electronic effects are only secondary and present only at higher Ag coverages.
| Language: | English |
|---|---|
| Year: | 2003 |
| Pages: | 233-239 |
| ISSN: | 18792758 and 00396028 |
| Types: | Journal article |
| DOI: | 10.1016/S0039-6028(03)00816-1 |
| ORCIDs: | Chorkendorff, Ib |
