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Thermo-programmed reduction study of Pt/WOx–ZrO2 materials by thermogravimetry

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Abstract

The thermo-programmed reduction study of Pt/WOx–ZrO2 materials prepared with different tungsten loading were performed by thermogravimetry. The samples were synthesized by impregnation method and calcined at 600, 700 and 800°C. The characterizations of both un-calcined and calcined materials were carried out using different techniques: thermal analysis (TG and DTA), X-ray diffraction (XRD) and thermo-programmed reduction (TPR). TG and DTA analysis of un-calcined were used to determination of calcination temperatures of the samples. XRD diffractograms were useful to help us in the determination of phase presents. TPR profiles showed between three and four events at different temperatures attributed to platinum reduction and the different stages of tungsten specie reduction.

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Authors and Affiliations

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

    A. M. Garrido Pedrosa, D. M. A. Melo & A. S. Araujo

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

    M. J. B. Souza

Authors
  1. A. M. Garrido Pedrosa
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  2. M. J. B. Souza
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  3. D. M. A. Melo
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  4. A. S. Araujo
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Correspondence to A. M. Garrido Pedrosa.

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Garrido Pedrosa, A.M., Souza, M.J.B., Melo, D.M.A. et al. Thermo-programmed reduction study of Pt/WOx–ZrO2 materials by thermogravimetry. J Therm Anal Calorim 87, 351–355 (2007). https://doi.org/10.1007/s10973-005-7432-y

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  • DOI: https://doi.org/10.1007/s10973-005-7432-y

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