Issue 13, 2012

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

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

Supplementary files

Article information

Article type
Paper
Submitted
08 Feb 2012
Accepted
10 Feb 2012
First published
22 Feb 2012

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

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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