Get access

Raman scattering of MnOx[BOND]CeOx composite catalysts: structural aspects and laser-heating effects

Authors

  • Barbara Fazio,

    Corresponding author
    1. CNR - Istituto per i Processi Chimico-Fisici, I-98158 Messina, Italy
    • CNR - Istituto per i Processi Chimico-Fisici, Viale F. Stagno D'Alcontres 37, I-98158 Messina, Italy.
    Search for more papers by this author
  • Lorenzo Spadaro,

    1. CNR- Istituto CNR-ITAE “Nicola Giordano”, I-98126 S. Lucia Messina, Italy
    2. Dipartimento di Chimica Industriale e Ingegneria dei Materiali, Università di Messina, I-98166 Messina, Italy
    Search for more papers by this author
  • Giuseppe Trunfio,

    1. Université de Franche-Comté, Chrono-environnement, UMR 6249 UFC/CNRS usc INRA, 25030 Besançon Cedex, France
    Search for more papers by this author
  • Jacopo Negro,

    1. Dipartimento di Chimica Industriale e Ingegneria dei Materiali, Università di Messina, I-98166 Messina, Italy
    Search for more papers by this author
  • Francesco Arena

    1. CNR- Istituto CNR-ITAE “Nicola Giordano”, I-98126 S. Lucia Messina, Italy
    2. Dipartimento di Chimica Industriale e Ingegneria dei Materiali, Università di Messina, I-98166 Messina, Italy
    Search for more papers by this author

Abstract

Composite MnOx[BOND]CeOx catalysts (Mnat: Ceat = 1) synthesized via the redox and coprecipitation routes were comparatively characterized by micro-Raman spectroscopy using a laser irradiation power ranging between 0.6 and 4.2 mW. A quasi-molecular dispersion of the oxide species determines a major and irreversible structural rearrangement of the redox MnOx[BOND]CeOx system because of severe heating effects for laser power in excess of 0.6 mW. The X-ray diffraction data of samples calcined in the range of 673[BOND]1273 K confirm that the micro-Raman characterization of the composite MnOx[BOND]CeOx systems requires an adequate minimization of the irradiation power to prevent the strong sintering and restructuring phenomena due to laser-heating effects. Copyright © 2011 John Wiley & Sons, Ltd.

Ancillary