Role of RuO2(100) in surface oxidation and CO oxidation catalysis on Ru(0001)

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10334015" target="_blank" >RIV/00216208:11320/16:10334015 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=5wLEfe_CjR" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=5wLEfe_CjR</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c5cp05807d" target="_blank" >10.1039/c5cp05807d</a>

Result language
angličtina
Original language name
Role of RuO2(100) in surface oxidation and CO oxidation catalysis on Ru(0001)
Original language description
We have studied the oxidation of the Ru(0001) surface by in situ microscopy during exposure to NO2, an efficient source of atomic oxygen, at elevated temperatures. In a previous investigation [Flege et al., Phys. Rev. B: Condens. Matter Mater. Phys., 2008, 78, 165407], at O coverages exceeding 1 monolayer, using the combination of intensity voltage (I(V) low-energy electron microscopy (LEEM) and multiple scattering calculations for the (00) beam in the very-tow-energy range (E <= 50 eV) we identified three surface components during the initial Ru oxidation: a (1 x 1)-O chemisorption phase, the RuO2(110) oxide phase, and a surface oxide structure characterized by a tritayer O-Ru-O stacking. Here, we use dark-field LEEM imaging and micro-illumination low-energy electron diffraction in the range of 100 to 400 eV to show that this trilayer phase is actually a RuO2(100)-(1 x 1) phase with possibly mixed O and Ru surface terminations. This identification rationalizes the thermodynamic stability of this phase at elevated temperatures and is consistent with the observation of catalytic activity of the phase in CO oxidation.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
<a href="/en/project/EF16_013%2F0001788" target="_blank" >EF16_013/0001788: Surface Physics Laboratory - Materials Science Beamline</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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