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Influence of the synthesis method on THE DTG-TPR profiles of Pt/WOx–ZrO2 bifunctional catalysts

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Abstract

Pt/WOx–ZrO2 bifunctional catalysts were synthesized using impregnation and polymeric precursor methods. After the synthesis process the samples were calcined at 600, 700 and 800°C and characterized by X-ray diffraction, nitrogen adsorption and temperature programmed reduction study by thermogravimetry. DTG-TPR profiles showed between three and five reduction events at different temperatures attributed to platinum reduction and to different stages of tungsten species reduction. A comparative study of the synthesis method influence on the DTG-TPR curves was accomplished.

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Authors and Affiliations

  1. Department of Chemistry, Federal University of Rio Grande do Norte, Natal, Brazil, 59078-970, CP 1692, RN

    A. M. Garrido Pedrosa, S. H. Lima, Dulce M.. A. Melo & A. S. Araújo

  2. Department of Chemical Engineering, Federal University of Sergipe, São Cristovão, Brazil, 49100-000, SE

    M. J. B. Souza

  3. CCEN, Department of Chemistry, Federal University of the Paraíba, João Pessoa, Brazil, 59059-900, PB

    A. G. Souza

Authors
  1. A. M. Garrido Pedrosa
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  2. M. J. B. Souza
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  3. S. H. Lima
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  4. Dulce M.. A. Melo
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  5. A. G. Souza
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  6. A. S. Araújo
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Correspondence to A. M. Garrido Pedrosa.

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Garrido Pedrosa, A.M., Souza, M.J.B., Lima, S.H. et al. Influence of the synthesis method on THE DTG-TPR profiles of Pt/WOx–ZrO2 bifunctional catalysts. J Therm Anal Calorim 87, 703–707 (2007). https://doi.org/10.1007/s10973-006-7777-x

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  • DOI: https://doi.org/10.1007/s10973-006-7777-x

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