CO oxidation on Pt(111) at near ambient pressures

Journal article
(Original article)

Publication Details

Author(s): Krick Calderon S, Grabau M, Ovari L, Kress B, Steinrück HP, Papp C
Journal: Journal of Chemical Physics
Publisher: American Institute of Physics (AIP)
Publication year: 2016
Volume: 144
Journal issue: 4
ISSN: 0021-9606


The oxidation of CO on Pt(111) was investigated simultaneously by near ambient pressure X-ray photoelectron spectroscopy and online gas analysis. Different CO:O reaction mixtures at total pressures of up to 1 mbar were used in continuous flow mode to obtain an understanding of the surface chemistry. By temperature-programmed and by isothermal measurements, the onset temperature of the reaction was determined for the different reactant mixtures. Highest turnover frequencies were found for the stoichiometric mixture. At elevated temperatures, the reaction becomes diffusion-limited in both temperature-programmed and isothermal measurements. In the highly active regime, no adsorbates were detected on the surface; it is therefore concluded that the catalyst surface is in a metallic state, within the detection limits of the experiment, under the applied conditions. Minor bulk impurities such as silicon were observed to influence the reaction up to total inhibition by formation of non-platinum oxides.

FAU Authors / FAU Editors

Grabau, Mathias Dr.
Lehrstuhl für Physikalische Chemie II
Krick Calderon, Sandra
Lehrstuhl für Physikalische Chemie II
Papp, Christian PD Dr.
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II

Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials

External institutions
University of Szeged / József Attila Tudományegyetem Szeged

How to cite

Krick Calderon, S., Grabau, M., Ovari, L., Kress, B., Steinrück, H.-P., & Papp, C. (2016). CO oxidation on Pt(111) at near ambient pressures. Journal of Chemical Physics, 144(4).

Krick Calderon, Sandra, et al. "CO oxidation on Pt(111) at near ambient pressures." Journal of Chemical Physics 144.4 (2016).


Last updated on 2018-05-10 at 14:50