CO oxidation on Pt(111) at near ambient pressures

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autor(en): Krick Calderon S, Grabau M, Ovari L, Kress B, Steinrück HP, Papp C
Zeitschrift: Journal of Chemical Physics
Verlag: American Institute of Physics (AIP)
Jahr der Veröffentlichung: 2016
Band: 144
Heftnummer: 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-Autoren / FAU-Herausgeber

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

Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials

Autor(en) der externen Einrichtung(en)
University of Szeged / József Attila Tudományegyetem Szeged


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).


Zuletzt aktualisiert 2018-05-10 um 14:50