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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 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.
. Garrido Pedrosa , AM , Souza , MJB , Lima , SH , Dulce , MAMelo , Souza , AG , Araujo , AS . 2007 . Influence of the synthesis methods of the DTG-TPR profiles of Pt/WOx-ZrO 2 bifunctional catalysts . J Therm Anal Calorim . 87 : 703 – 707 10
