Ceria reoxidation by CO2: A model study

Staudt T, Lykhach Y, Tsud N, Skala T, Prince KC, Matolin V, Libuda J (2010)

Publication Status: Published

Publication Type: Journal article

Publication year: 2010

Journal

Journal of Catalysis Elsevier

Publisher: ACADEMIC PRESS INC ELSEVIER SCIENCE

Book Volume: 275

Pages Range: 181-185

Journal Issue: 1

DOI: 10.1016/j.jcat.2010.07.032

Abstract

The activation of CO2 on ceria-based catalysts opens chemical routes to the use of CO2 as an oxidizing agent. Toward a better understanding of the underlying surface reactions, we have performed a model study on well-defined CeO2-x thin films on Cu(1 1 1) under ultra-high-vacuum conditions. Resonant photoelectron spectroscopy is used as a highly sensitive tool to monitor changes in the oxidation state of cerium as a function of CO2 exposure and thermal treatment. It is shown that partial reoxidation of CeO2-x by CO2 occurs with high reaction probabilities (i) even at temperatures as low as room temperature, (ii) on pure CeO2-x in the complete absence of any noble metal co-catalysts, and (iii) in the absence of surface hydroxyl groups or water. In contrast to previous studies on ceria powders, the findings clearly demonstrate the high activity of pure hydroxyl- and metal-free ceria surfaces for CO2 activation, even at low reaction temperatures. (C) 2010 Elsevier Inc. All rights reserved.

Authors with CRIS profile

Yaroslava Lykhach Lehrstuhl für Physikalische Chemie II Jörg Libuda Professur für Physikalische Chemie

Additional Organisation(s)

Lehrstuhl für Katalytische Grenzflächenforschung

Involved external institutions

Elettra Sincrotrone Trieste S.C.p.A. IT Italy (IT) Univerzita Karlova v Praze / Charles University in Prague CZ Czech Republic (CZ)

How to cite

APA:

Staudt, T., Lykhach, Y., Tsud, N., Skala, T., Prince, K.C., Matolin, V., & Libuda, J. (2010). Ceria reoxidation by CO2: A model study. Journal of Catalysis, 275(1), 181-185. https://doi.org/10.1016/j.jcat.2010.07.032

MLA:

Staudt, Thorsten, et al. "Ceria reoxidation by CO2: A model study." Journal of Catalysis 275.1 (2010): 181-185.

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