skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: In Situ XAS Studies on the Structure of the Active Site of Supported Gold Catalysts

Abstract

Gold clusters supported on Al2O3 and TiO2 have been exposed to different mixtures of CO and O2. Their structure has been probed in situ using X-ray absorption spectroscopy (XAS) at the Au L3-edge. In all materials, the dominant phase during catalysis is Au0. Both samples show variations of the electronic structure of the gold clusters with changing reaction conditions as evidenced by changes in the X-ray absorption near-edge (XANES) region. These variations are caused by interaction between the gold clusters and the carbon monoxide present in the gas phase. The gold atoms remain zerovalent throughout all experiments confirming the importance of Au0 for catalytic activity.

Authors:
; ;  [1]; ;  [2];  [3];  [1];  [4]
  1. Molecular Materials Centre, School of Chemical Engineering and Analytical Science, Sackville Street, PO Box 88, Manchester, M60 1QD (United Kingdom)
  2. Laboratoire de Reactivite de Surface, UMR 7609 CNRS, Universite Pierre et Marie Curie, 4 place Jussieu, 75252, Paris, Cedex 05 (France)
  3. Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich (Switzerland)
  4. (United Kingdom)
Publication Date:
OSTI Identifier:
21054692
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 882; Journal Issue: 1; Conference: XAFS13: 13. international conference on X-ray absorption fine structure, Stanford, CA (United States), 9-14 Jul 2006; Other Information: DOI: 10.1063/1.2644605; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTRA; ABSORPTION SPECTROSCOPY; ALUMINIUM OXIDES; CARBON MONOXIDE; CATALYSIS; CATALYSTS; ELECTRONIC STRUCTURE; GOLD; SOLID CLUSTERS; TITANIUM OXIDES; VARIATIONS; X-RAY SPECTRA; X-RAY SPECTROSCOPY

Citation Formats

Weiher, Norbert, Beesley, Angela M., Tsapatsaris, Nikolaos, Louis, Catherine, Delannoy, Laurent, Bokhoven, Jeroen A. van, Schroeder, Sven L. M., and Molecular Materials Centre, School of Chemistry, Sackville Street, PO Box 88, Manchester, M60 1QD. In Situ XAS Studies on the Structure of the Active Site of Supported Gold Catalysts. United States: N. p., 2007. Web. doi:10.1063/1.2644605.
Weiher, Norbert, Beesley, Angela M., Tsapatsaris, Nikolaos, Louis, Catherine, Delannoy, Laurent, Bokhoven, Jeroen A. van, Schroeder, Sven L. M., & Molecular Materials Centre, School of Chemistry, Sackville Street, PO Box 88, Manchester, M60 1QD. In Situ XAS Studies on the Structure of the Active Site of Supported Gold Catalysts. United States. doi:10.1063/1.2644605.
Weiher, Norbert, Beesley, Angela M., Tsapatsaris, Nikolaos, Louis, Catherine, Delannoy, Laurent, Bokhoven, Jeroen A. van, Schroeder, Sven L. M., and Molecular Materials Centre, School of Chemistry, Sackville Street, PO Box 88, Manchester, M60 1QD. Fri . "In Situ XAS Studies on the Structure of the Active Site of Supported Gold Catalysts". United States. doi:10.1063/1.2644605.
@article{osti_21054692,
title = {In Situ XAS Studies on the Structure of the Active Site of Supported Gold Catalysts},
author = {Weiher, Norbert and Beesley, Angela M. and Tsapatsaris, Nikolaos and Louis, Catherine and Delannoy, Laurent and Bokhoven, Jeroen A. van and Schroeder, Sven L. M. and Molecular Materials Centre, School of Chemistry, Sackville Street, PO Box 88, Manchester, M60 1QD},
abstractNote = {Gold clusters supported on Al2O3 and TiO2 have been exposed to different mixtures of CO and O2. Their structure has been probed in situ using X-ray absorption spectroscopy (XAS) at the Au L3-edge. In all materials, the dominant phase during catalysis is Au0. Both samples show variations of the electronic structure of the gold clusters with changing reaction conditions as evidenced by changes in the X-ray absorption near-edge (XANES) region. These variations are caused by interaction between the gold clusters and the carbon monoxide present in the gas phase. The gold atoms remain zerovalent throughout all experiments confirming the importance of Au0 for catalytic activity.},
doi = {10.1063/1.2644605},
journal = {AIP Conference Proceedings},
number = 1,
volume = 882,
place = {United States},
year = {Fri Feb 02 00:00:00 EST 2007},
month = {Fri Feb 02 00:00:00 EST 2007}
}