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Title: An In-Situ XAS Study of the Structural Changes in a CuO-CeO2/Al2O3 Catalyst during Total Oxidation of Propane

Abstract

A CuOx-CeOx/Al2O3 catalyst was studied with in-situ transmission Cu K XAS for the total oxidation of propane as model reaction for the catalytic elimination of volatile organic compounds. The local Cu structure was determined for the catalyst as such, after pre-oxidation and after reduction with propane. The catalyst as such has a local CuO structure. No structural effect was observed upon heating in He up to 600 deg. C or after pre-oxidation at 150 deg. C. A full reduction of the Cu2+ towards metallic Cu0 occurred, when propane was fed to the catalyst. The change in local Cu structure during propane reduction was followed with a time resolution of 1 min. The {chi}(k) scans appeared as linear combinations of start and end spectra, CuO and Cu structure, respectively. However, careful examination of the XANES edge spectra indicates the presence of a small amount of additional Cu1+ species.

Authors:
; ; ;  [1]; ; ; ;  [2]
  1. Ghent University, Department of Solid State Sciences, Krijgslaan 281 S1, B-9000 Gent (Belgium)
  2. Ghent University, Laboratorium voor Petrochemische Techniek, Krijgslaan 281 S5, B-9000 Gent (Belgium)
Publication Date:
OSTI Identifier:
21054721
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: 10.1063/1.2644635; (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; CATALYSTS; CERIUM OXIDES; COPPER OXIDES; CRYSTAL STRUCTURE; INTERFACES; OXIDATION; PROPANE; REDUCTION; TIME RESOLUTION; X-RAY SPECTRA; X-RAY SPECTROSCOPY

Citation Formats

Silversmith, Geert, Poelman, Hilde, Poelman, Dirk, Gryse, Roger de, Olea, Maria, Balcaen, Veerle, Heynderickx, Philippe, and Marin, Guy B. An In-Situ XAS Study of the Structural Changes in a CuO-CeO2/Al2O3 Catalyst during Total Oxidation of Propane. United States: N. p., 2007. Web. doi:10.1063/1.2644635.
Silversmith, Geert, Poelman, Hilde, Poelman, Dirk, Gryse, Roger de, Olea, Maria, Balcaen, Veerle, Heynderickx, Philippe, & Marin, Guy B. An In-Situ XAS Study of the Structural Changes in a CuO-CeO2/Al2O3 Catalyst during Total Oxidation of Propane. United States. doi:10.1063/1.2644635.
Silversmith, Geert, Poelman, Hilde, Poelman, Dirk, Gryse, Roger de, Olea, Maria, Balcaen, Veerle, Heynderickx, Philippe, and Marin, Guy B. Fri . "An In-Situ XAS Study of the Structural Changes in a CuO-CeO2/Al2O3 Catalyst during Total Oxidation of Propane". United States. doi:10.1063/1.2644635.
@article{osti_21054721,
title = {An In-Situ XAS Study of the Structural Changes in a CuO-CeO2/Al2O3 Catalyst during Total Oxidation of Propane},
author = {Silversmith, Geert and Poelman, Hilde and Poelman, Dirk and Gryse, Roger de and Olea, Maria and Balcaen, Veerle and Heynderickx, Philippe and Marin, Guy B.},
abstractNote = {A CuOx-CeOx/Al2O3 catalyst was studied with in-situ transmission Cu K XAS for the total oxidation of propane as model reaction for the catalytic elimination of volatile organic compounds. The local Cu structure was determined for the catalyst as such, after pre-oxidation and after reduction with propane. The catalyst as such has a local CuO structure. No structural effect was observed upon heating in He up to 600 deg. C or after pre-oxidation at 150 deg. C. A full reduction of the Cu2+ towards metallic Cu0 occurred, when propane was fed to the catalyst. The change in local Cu structure during propane reduction was followed with a time resolution of 1 min. The {chi}(k) scans appeared as linear combinations of start and end spectra, CuO and Cu structure, respectively. However, careful examination of the XANES edge spectra indicates the presence of a small amount of additional Cu1+ species.},
doi = {10.1063/1.2644635},
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}
}