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Surface Science Spectra / Volume 15 / Issue 1

Surf. Sci. Spectra 15, 41 (2008); http://dx.doi.org/10.1116/11.20070201 (18 pages)

La0.6Sr0.4Co1-yFeyO3-δ Powders Studied by X-ray Photoelectron Spectroscopy

Fabio Poletto1, Marta Maria Natile2, Alessandro Galenda1, and Antonella Glisenti1

1Universitá di Padova, Dipartimento di Scienze Chimiche, via F. Marzolo, 1, Padova, 35131, Italy
2ISTM-CNR, Universitá di Padova, Dipartimento di Scienze Chimiche, via F. Marzolo, 1, Padova, 35131, Italy

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(Published online 6 January 2011)

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Perovskite-type oxides, ABO3, are known to be very good oxidation catalysts. The redox properties of the B cation, the availability of weakly bonded oxygen at the surface and the presence of lattice defects have been often claimed as responsible for their catalytic activity. Moreover, their performances can be improved if they are nanodimensioned. The present study focuses on the development of new LaCoO3-based catalysts for alcohol (such as methanol, ethanol) steam reforming. Several La0.6Sr0.4Co1-yFeyO3-δ (y=0.2, 0.5, 0.8) were prepared by the citrate gel method and calcined at 1073 K for 5 h in air. Herein, the influence of the cobalt/iron ratio on the surface properties was investigated.

© 2008 American Vacuum Society

ACKNOWLEDGMENTS

The authors gratefully acknowledge Professor E. Tondello for his helpful discussions. This work was supported by the following research programs: FISR-MIUR "Nanosistemi inorganici ed ibridi per lo sviluppo e l'innovazione di celle a combustibile", Progetto di ateneo - 2004 "Nuovi sistemi nanocompositi come materiali attivi in celle a combustibile ad ossido solido."

Article Outline

  1. SPECIMEN DESCRIPTION (Accession #01090, 1 of 3)
  2. SPECIMEN DESCRIPTION (Accession #01091, 2 of 3)
  3. SPECIMEN DESCRIPTION (Accession #01092, 3 of 3)
  4. INSTRUMENT DESCRIPTION
  5. INSTRUMENT PARAMETERS COMMON TO ALL SPECTRA
    1. Spectrometer
    2. Geometry
    3. Ion Gun
  6. DATA ANALYSIS METHOD

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KEYWORDS and PACS

Keywords

calcination, catalysis, ceramics, crystal defects, lanthanum compounds, nanofabrication, nanoparticles, oxidation, powders, reduction (chemical), steam reforming, strontium compounds, X-ray photoelectron spectra, Perovskite, doped transition metal oxide, nanostructured powder, La0.6Sr0.4Co1-yFeyO3-δ

PACS

  • 81.07.Wx

    Nanopowders

  • 81.20.Ev

    Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation

  • 81.40.Gh

    Other heat and thermomechanical treatments

  • 82.65.+r

    Surface and interface chemistry; heterogeneous catalysis at surfaces

  • 82.80.Pv

    Electron spectroscopy (X-ray photoelectron (XPS), Auger electron spectroscopy (AES), etc.)

  • 79.60.Bm

    Clean metal, semiconductor, and insulator surfaces

History
Received 2 February 2007
Accepted 15 April 2008
Published online 6 January 2011
Digital Object Identifier
http://dx.doi.org/10.1116/11.20070201

PUBLICATION DATA

ISSN

1055-5269 (print)  
1520-8575 (online)

Publisher

American Vacuum Society

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