Issue 13, 2012
From the journal:

Physical Chemistry Chemical Physics

The silver–oxygen system in catalysis: new insights by near ambient pressure X-ray photoelectron spectroscopy†

Tulio C. R. Rocha,*a   Andreas Oestereich,a   Demid V. Demidov,ab   Michael Hävecker,‡a   Spiros Zafeiratos,c   Gisela Weinberg,a   Valerii I. Bukhtiyarov,b   Axel Knop-Gerickea  and  Robert Schlögla  

* Corresponding authors

a Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Inorganic Chemistry, Faradayweg 4–6, Berlin, Germany
E-mail: tulio@fhi-berlin.mpg.de
Fax: +49 30 8413 4676
Tel: +49 30 8413 4421

b Boreskov Institute of Catalysis, pr. Lavrentieva 5, Novosibirsk, Russia

c Laboratoire LMSPC UMR7515 CNRS Univ. Strasbourg, F-67087 Strasbourg cedex 2, France

Abstract

We addressed the interaction of oxygen with silver by synchrotron based near ambient pressure X-ray photoelectron spectroscopy at temperatures relevant for industrial oxidation reactions performed with silver catalysts. For silver single crystals, polycrystalline foils and powders in equilibrium with gas phase O2, we observed the dynamics of the formation of five different atomic oxygen species with relative abundances depending on the temperature and time. Correlation of their formation kinetics with spectroscopic features and thermal stability indicates that these are distinct species with different electronic structures, which might relate to the different roles of silver in oxidation reactions.

Graphical abstract: The silver–oxygen system in catalysis: new insights by near ambient pressure X-ray photoelectron spectroscopy

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Article information

DOI
https://doi.org/10.1039/C2CP22472K
Article type
Paper
Submitted
08 Feb 2012
Accepted
10 Feb 2012
First published
22 Feb 2012

Phys. Chem. Chem. Phys., 2012,14, 4554-4564

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The silver–oxygen system in catalysis: new insights by near ambient pressure X-ray photoelectron spectroscopy

T. C. R. Rocha, A. Oestereich, D. V. Demidov, M. Hävecker, S. Zafeiratos, G. Weinberg, V. I. Bukhtiyarov, A. Knop-Gericke and R. Schlögl, Phys. Chem. Chem. Phys., 2012, 14, 4554 DOI: 10.1039/C2CP22472K

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