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Title: Interaction of CO with Rh supported on stoichiometric and reduced CeO{sub 2}(111) and CeO{sub 2}(100) surfaces

Abstract

The structure and reactivity of Rh films supported on the surface of a CeO{sub 2} single crystal were studied using Auger electron spectroscopy (AES) and temperature-programmed desorption (TPD). Rhodium films deposited from the vapor phase were found to grow via the nucleation of three-dimensional particles at a sample temperature of 300 K. Annealing of the Rh films resulted in further agglomeration of the metal layer. Carbon monoxide TPD spectra obtained from Rh supported on oxygen-annealed CeO{sub 2}(111) and CeO{sub 2}(100) substrates were similar to those obtained from the low-index planes of Rh single crystals, with the exception that a small fraction of the CO (ca. 2%) was oxidized to CO{sub 2}. In contrast, a new high-temperature CO desorption state was observed in the TPD spectra obtained from Rh supported on partially reduced CeO{sub 2} surfaces. 25 refs., 9 figs.

Authors:
;  [1]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States)
Publication Date:
OSTI Identifier:
263770
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Catalysis; Journal Volume: 159; Journal Issue: 1; Other Information: PBD: Mar 1996
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 01 COAL, LIGNITE, AND PEAT; CARBON MONOXIDE; DESORPTION; CERIUM OXIDES; SORPTIVE PROPERTIES; RHODIUM; CATALYST SUPPORTS; TEMPERATURE DEPENDENCE; AGGLOMERATION; ANNEALING; AUGER ELECTRON SPECTROSCOPY; STOICHIOMETRY; MILLER INDICES; FILMS; OXIDATION

Citation Formats

Stubenrauch, J., and Vohs, J.M. Interaction of CO with Rh supported on stoichiometric and reduced CeO{sub 2}(111) and CeO{sub 2}(100) surfaces. United States: N. p., 1996. Web. doi:10.1006/jcat.1996.0063.
Stubenrauch, J., & Vohs, J.M. Interaction of CO with Rh supported on stoichiometric and reduced CeO{sub 2}(111) and CeO{sub 2}(100) surfaces. United States. doi:10.1006/jcat.1996.0063.
Stubenrauch, J., and Vohs, J.M. Fri . "Interaction of CO with Rh supported on stoichiometric and reduced CeO{sub 2}(111) and CeO{sub 2}(100) surfaces". United States. doi:10.1006/jcat.1996.0063.
@article{osti_263770,
title = {Interaction of CO with Rh supported on stoichiometric and reduced CeO{sub 2}(111) and CeO{sub 2}(100) surfaces},
author = {Stubenrauch, J. and Vohs, J.M.},
abstractNote = {The structure and reactivity of Rh films supported on the surface of a CeO{sub 2} single crystal were studied using Auger electron spectroscopy (AES) and temperature-programmed desorption (TPD). Rhodium films deposited from the vapor phase were found to grow via the nucleation of three-dimensional particles at a sample temperature of 300 K. Annealing of the Rh films resulted in further agglomeration of the metal layer. Carbon monoxide TPD spectra obtained from Rh supported on oxygen-annealed CeO{sub 2}(111) and CeO{sub 2}(100) substrates were similar to those obtained from the low-index planes of Rh single crystals, with the exception that a small fraction of the CO (ca. 2%) was oxidized to CO{sub 2}. In contrast, a new high-temperature CO desorption state was observed in the TPD spectra obtained from Rh supported on partially reduced CeO{sub 2} surfaces. 25 refs., 9 figs.},
doi = {10.1006/jcat.1996.0063},
journal = {Journal of Catalysis},
number = 1,
volume = 159,
place = {United States},
year = {Fri Mar 01 00:00:00 EST 1996},
month = {Fri Mar 01 00:00:00 EST 1996}
}