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<p>A comparative study of the catalytic dehydrogenation of propane by the molecular metal oxide K<sub>5</sub>[α-1,2-PV<sub>2</sub>W<sub>10</sub>O<sub>40</sub>] (PV<sub>2</sub>W<sub>10</sub>) supported on ZrO<sub>2</sub>, TiO<sub>2</sub>, and CeO<sub>2</sub> reveals high propylene selectivity when supported on ZrO<sub>2</sub>, but higher activity on CeO<sub>2</sub>. The supported catalysts were characterized by FT-IR and Raman spectroscopy, nitrogen adsorption, powder X-ray diffraction (PXRD), elemental analysis, hydrogen temperature programmed reduction (H<sub>2</sub>-TPR), and ammonia temperature programmed desorption (NH<sub>3</sub>-TPD). The reducibility order of the materials was found to be PV<sub>2</sub>W<sub>10</sub>/ZrO<sub>2</sub> &lt; PV<sub>2</sub>W<sub>10</sub>/TiO<sub>2</sub> &lt; PV<sub>2</sub>W<sub>10</sub>/CeO<sub>2</sub> while the total acidity was found to be opposite that of reducibility: PV<sub>2</sub>W<sub>10</sub>/CeO<sub>2</sub> &lt; PV<sub>2</sub>W<sub>10</sub>/TiO<sub>2</sub> &lt; PV<sub>2</sub>W<sub>10</sub>/ ZrO<sub>2</sub>. The high propylene selectivity was a function of the strength of the acid sites while higher activity was attributed to increased reducibility.</p>

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Divanadium substituted Keggin [α-PV2W10O40]5− on supports- ZrO2, TiO2 and CeO2: synthesis, characterization, and catalytic properties for oxidative dehydrogenation of propane

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • José C. Orozco,
  • Damola T. Shuaib,
  • Christopher L. Marshall,
  • M. Ishaque Khan

摘要

A comparative study of the catalytic dehydrogenation of propane by the molecular metal oxide K5[α-1,2-PV2W10O40] (PV2W10) supported on ZrO2, TiO2, and CeO2 reveals high propylene selectivity when supported on ZrO2, but higher activity on CeO2. The supported catalysts were characterized by FT-IR and Raman spectroscopy, nitrogen adsorption, powder X-ray diffraction (PXRD), elemental analysis, hydrogen temperature programmed reduction (H2-TPR), and ammonia temperature programmed desorption (NH3-TPD). The reducibility order of the materials was found to be PV2W10/ZrO2 < PV2W10/TiO2 < PV2W10/CeO2 while the total acidity was found to be opposite that of reducibility: PV2W10/CeO2 < PV2W10/TiO2 < PV2W10/ ZrO2. The high propylene selectivity was a function of the strength of the acid sites while higher activity was attributed to increased reducibility.