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The Kinetics of CO Oxidation on RuO2(110): Bridging the Pressure Gap
- Source :
- The Journal of Physical Chemistry B. 106:3422-3427
- Publication Year :
- 2002
- Publisher :
- American Chemical Society (ACS), 2002.
-
Abstract
- The steady-state rate rCO2 of CO2 formation from CO + O2 on an epitaxially grown RuO2(110) single-crystal surface was recorded as a function of the partial pressures in the 10-7−10-6 mbar range. The RuO2(110) surface exposes singly coordinatively unsaturated “Ru-cus” sites and 2-fold coordinatively unsaturated “Ru-bridge” sites. Normally, the Ru-bridge sites are saturated by oxygen (O-bridge) which can be replaced by CO. The stage of the surface was controlled by vibrational spectroscopy (HREELS), and analysis of the kinetic data was based on previous information about the structural and adsorptive properties of this surface. Measurements of the rate as a function of temperature up to ≈350 K in a 1:1 mixture of CO and O2, each with 10-7 mbar partial pressure, revealed most remarkable agreement with data reported by Zang and Kisch13 with small supported RuO2 particles prepared from aqueous solution for 1 bar total pressure. Under these conditions of temperature and ratio of partial pressures the reaction w...
- Subjects :
- Aqueous solution
Kinetics
Inorganic chemistry
Analytical chemistry
Infrared spectroscopy
chemistry.chemical_element
Partial pressure
Oxygen
Surfaces, Coatings and Films
Catalysis
chemistry.chemical_compound
chemistry
Materials Chemistry
Physical and Theoretical Chemistry
Total pressure
Carbon monoxide
Subjects
Details
- ISSN :
- 15205207 and 15206106
- Volume :
- 106
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry B
- Accession number :
- edsair.doi...........1ebb8848bf3e43126efe5e99b888ff7d