Synthesis,structure, and morphology of bifunctional catalysts based on zirconia modified by molybdenum oxide |
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| Authors: | A. M. Garrido Pedrosa D. M. A. Melo M. J. B. Souza A. S. Araujo |
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| Affiliation: | 1.Department of Chemistry,Federal University of Rio Grande do Norte,Natal-RN,Brazil;2.Department of Chemical Engineering,Federal University of Sergipe,S?o Cristov?o-SE,Brazil |
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| Abstract: | The preparation of Pt/MoO x -ZrO2 materials has been carried out by polymeric precursor method and with molybdenum loadings in the range 10–20 wt %. The synthesized samples were calcined at 600, 700, and 800°C. The structure and texture of the calcined Pt/MoO x -ZrO2 materials were characterized by x-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy, and N2 adsorption measurements. XRD of the calcined samples revealed the formation of crystalline ZrO2, Pt metal, and Zr(MoO4)2. Crystalline Zr(MoO4)2 was also detected by FTIR spectra. A decrease in the specific surface area was observed by nitrogen adsorption experiments when the temperatures of calcination and molybdenum loading increased. The text was submitted by the authors in English. |
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