A high pressure x-ray photoelectron spectroscopy study of CO oxidation over Rh(100)

Journal of Physics. Condensed Matter : an Institute of Physics Journal
J GustafsonE Lundgren

Abstract

We have studied the oxidation of CO over Rh(100) using high pressure x-ray photoelectron spectroscopy under CO and O2 pressures ranging from 0.01 to 1 mbar. The results show a very low or no conversion for the CO covered surface found at low temperatures, while the activity rises slightly when the temperature is high enough for some CO to desorb, exposing surface sites for dissociative O2 adsorption. As the temperature is increased further, more CO desorbs and oxygen replaces CO as the dominating species at the surface. At the same time we find a sudden increase in the reactivity, such that all CO that reaches the surface is instantly transformed into CO2. We find that the O coverage in the active state is highly dependent on the total pressure and, although we do not detect any presence of a surface oxide as in previous surface x-ray diffraction studies, the highest O coverage indicates that the surface is close to being oxidized.

References

Jul 30, 2002·Physical Review Letters·B L M Hendriksen, J W M Frenken
Dec 31, 2005·Physical Review Letters·M D AckermannJ W M Frenken
Jun 3, 2010·The Review of Scientific Instruments·Michael E GrassZhi Liu
Jun 18, 2011·Physical Chemistry Chemical Physics : PCCP·R van RijnJ W M Frenken
Oct 1, 2011·Angewandte Chemie·Hans-Joachim FreundMartin Wolf
Nov 11, 2011·Journal of the American Chemical Society·Derek R ButcherZhi Liu
May 9, 2012·Journal of Physics. Condensed Matter : an Institute of Physics Journal·J GustafsonJ N Andersen
Mar 15, 2013·Physical Review Letters·S BlombergE Lundgren
Nov 1, 2012·The Journal of Physical Chemistry Letters·Ryo ToyoshimaHiroshi Kondoh

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Citations

May 22, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Joachim SchnadtNiclas Johansson
Feb 11, 2015·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Ryo Toyoshima, Hiroshi Kondoh
Sep 6, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·N JohanssonJ Knudsen
Jul 6, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·T KißlingerL Hammer
Jun 13, 2017·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Willem G OnderwaaterIrene M N Groot

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