Carbon monoxide oxidation on a Au(111) surface modified by spontaneously deposited Ru
The spontaneous deposition of Ru on Au(111) was performed in 10-3MRuCl3 + 0.5MH2SO4 solution. The obtained surface was characterized by STM under potential control in 0.5MH2SO4 solution. The coverage of the Au(111) terraces by deposited Ru was estimated by STM to be 0.02 ML. Step decoration...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Serbian Chemical Society
2001-01-01
|
| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2001/0352-51390104281S.pdf |
| Summary: | The spontaneous deposition of Ru on Au(111) was performed in 10-3MRuCl3 +
0.5MH2SO4 solution. The obtained surface was characterized by STM under
potential control in 0.5MH2SO4 solution. The coverage of the Au(111)
terraces by deposited Ru was estimated by STM to be 0.02 ML. Step decoration
could be noticed in the STM images, which indicates that the steps, as lined
defects, are active sites for the nucleation of Ru monolayer islands, while
the random distribution of Ru nuclei, observed on the terraces indicates
point defects as active sites. The electrocatalytic activity of Au(111)
surface modified by spontaneously deposited Ru was studied towards CO
oxidation. The significant enhancement in the reaction rate compared to CO
oxidation on a pure Au(111) surface, indicated that the edges of the
deposited Ru islands were the active sites for the reaction. |
|---|---|
| ISSN: | 0352-5139 1820-7421 |