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

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons22013

Rocha,  Tulio
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21921

Oestereich,  Andreas
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

Demidov,  Demid V.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Boreskov Institute of Catalysis;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21590

Hävecker,  Michael
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22227

Weinberg,  Gisela
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21743

Knop-Gericke,  Axel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22071

Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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c2cp22472k.pdf
(Publisher version), 4MB

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Citation

Rocha, T., Oestereich, A., Demidov, D. V., Hävecker, M., Zafeiratos, S., Weinberg, G., et al. (2012). The silver–oxygen system in catalysis: new insights by near ambient pressure X-ray photoelectron spectroscopy. Physical Chemistry Chemical Physics, 14(13), 4554-4564. doi:10.1039/C2CP22472K.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-9DC0-D
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.