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Acid-Base properties of MgCuAl mixed oxides

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Abstract

MgCuAl layered double hydroxides (LDHs) with a hydrotalcite like structure containing different proportions of Mg2+ and Cu2+ cations have been prepared. Thermogravimetry and X-ray diffraction data indicated that the transformation of LDH into mixed oxides is effective after calcination at 723 K, irrespective of the composition. The acid-base properties of these mixed oxides have been investigated using adsorption microcalorimetry and X-ray photoelectron spectroscopy with NH3 (for acidity) and SO2 (for basicity) as probe molecules. Their catalytic behaviour for the conversion of cyclohexanol has been tested. The acid-base properties and the selectivity of catalysts has been related to their composition.

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Authors and Affiliations

  1. LPCM UMR 5624, 2 av. P. Angot, 64053, Pau cedex 09, France

    S. Casenave, H. Martinez & C. Guimon

  2. Institut de Recherches sur la Catalyse, CNRS Avenue Einstein, 69626, VilleurbanneCedex, France

    A. Auroux

  3. Laboratory of Catalysis, Technical, University of Iasi, 71D Mangeron, Iasi, 6600, Romania

    V. Hulea & E. Dumitriu

Authors
  1. S. Casenave
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  2. H. Martinez
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  3. C. Guimon
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  4. A. Auroux
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  5. V. Hulea
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  6. E. Dumitriu
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Correspondence to C. Guimon.

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Casenave, S., Martinez, H., Guimon, C. et al. Acid-Base properties of MgCuAl mixed oxides. Journal of Thermal Analysis and Calorimetry 72, 191–198 (2003). https://doi.org/10.1023/A:1023980005672

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  • DOI: https://doi.org/10.1023/A:1023980005672

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