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Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 87: Issue 3
DOI:
https://doi.org/10.1007/s10973-006-7777-x
Authors:
A. Garrido Pedrosa
,
M. Souza
,
S. Lima
,
Dulce Melo
,
A. Souza
, and
A. Araújo

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 800C 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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