Visualization of atomic processes on ruthenium dioxide using scanning tunneling microscopy
(2004) In ChemPhysChem 5(2). p.167-174- Abstract
- The visualization of surface reactions on the atomic scale provides direct insight into the microscopic reaction steps taking place in a catalytic reaction at a (model) catalyst's surface. Employing the technique of scanning tunneling microscopy (STM), we investigated the CO oxidation reaction over the RuO2(110) and RuO2(100) surfaces. For both surfaces the protruding bridging O atoms are imaged in STM as bright features. The reaction mechanism is identical on both orientations of RuO2. CO molecules adsorb on the undercoordinated surface Ru atoms from where they recombine with undercoordinated O atoms to form CO2 at the oxide surface. In contrast to the RuO2(110) surface, the RuO2(100) surface stabilizes also a catalytically inactive c(2 x... (More)
- The visualization of surface reactions on the atomic scale provides direct insight into the microscopic reaction steps taking place in a catalytic reaction at a (model) catalyst's surface. Employing the technique of scanning tunneling microscopy (STM), we investigated the CO oxidation reaction over the RuO2(110) and RuO2(100) surfaces. For both surfaces the protruding bridging O atoms are imaged in STM as bright features. The reaction mechanism is identical on both orientations of RuO2. CO molecules adsorb on the undercoordinated surface Ru atoms from where they recombine with undercoordinated O atoms to form CO2 at the oxide surface. In contrast to the RuO2(110) surface, the RuO2(100) surface stabilizes also a catalytically inactive c(2 x 2) phase may play an important role in the deactivation of RuO2 catalysts in the electrochemical Cl-2 evolution and other heterogeneous reactions. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/286173
- author
- Over, H ; Knapp, M ; Lundgren, Edvin LU ; Seitsonen, AP ; Schmid, M and Varga, P
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- surface chemistry, microscopy, scanning probe, ruthenium dioxide, catalytic activity, oxide surfaces
- in
- ChemPhysChem
- volume
- 5
- issue
- 2
- pages
- 167 - 174
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:15038276
- wos:000220019100001
- scopus:2442564479
- ISSN
- 1439-7641
- DOI
- 10.1002/cphc.200300833
- language
- English
- LU publication?
- yes
- id
- a4a5caa1-5d95-4ae5-9cda-5673ed755235 (old id 286173)
- date added to LUP
- 2016-04-01 12:18:19
- date last changed
- 2022-02-18 20:44:15
@article{a4a5caa1-5d95-4ae5-9cda-5673ed755235, abstract = {{The visualization of surface reactions on the atomic scale provides direct insight into the microscopic reaction steps taking place in a catalytic reaction at a (model) catalyst's surface. Employing the technique of scanning tunneling microscopy (STM), we investigated the CO oxidation reaction over the RuO2(110) and RuO2(100) surfaces. For both surfaces the protruding bridging O atoms are imaged in STM as bright features. The reaction mechanism is identical on both orientations of RuO2. CO molecules adsorb on the undercoordinated surface Ru atoms from where they recombine with undercoordinated O atoms to form CO2 at the oxide surface. In contrast to the RuO2(110) surface, the RuO2(100) surface stabilizes also a catalytically inactive c(2 x 2) phase may play an important role in the deactivation of RuO2 catalysts in the electrochemical Cl-2 evolution and other heterogeneous reactions.}}, author = {{Over, H and Knapp, M and Lundgren, Edvin and Seitsonen, AP and Schmid, M and Varga, P}}, issn = {{1439-7641}}, keywords = {{surface chemistry; microscopy; scanning probe; ruthenium dioxide; catalytic activity; oxide surfaces}}, language = {{eng}}, number = {{2}}, pages = {{167--174}}, publisher = {{John Wiley & Sons Inc.}}, series = {{ChemPhysChem}}, title = {{Visualization of atomic processes on ruthenium dioxide using scanning tunneling microscopy}}, url = {{http://dx.doi.org/10.1002/cphc.200300833}}, doi = {{10.1002/cphc.200300833}}, volume = {{5}}, year = {{2004}}, }