Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive 

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.

[img]PDF (Verlags-PDF) - Registered users only
1212Kb

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.

Item Type:Journal Article, refereed, further contribution
Communities & Collections:07 Faculty of Science > Institute of Physical Chemistry
DDC:540 Chemistry
Language:English
Date:February 2004
Deposited On:27 Mar 2009 10:37
Last Modified:28 Nov 2013 02:47
Publisher:Wiley-Blackwell
ISSN:1439-4235
Publisher DOI:10.1002/cphc.200300833
PubMed ID:15038276
Citations:Web of Science®. Times Cited: 33
Google Scholar™

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page