Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-3440
Over, H; Knapp, M; Lundgren, E; Seitsonen, A P; Schmid, M; Varga, P (2004). Visualization of atomic processes on ruthenium dioxide using scanning tunneling microscopy. ChemPhysChem, 5(2):167-174.
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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.
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|Item Type:||Journal Article, refereed, further contribution|
|Communities & Collections:||07 Faculty of Science > Department of Chemistry|
|Deposited On:||27 Mar 2009 09:37|
|Last Modified:||05 Jun 2014 13:51|
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