Influence of the crystalline structure of ZrO$\_\{2\; \}$ on the metallic properties of Pt in Pt/WO$\_\{3\}$–ZrO$\_\{2\}$ catalysts

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• 作者：Yori ; J.C. ; Parera ; J.M.
• 关键词：Pt metallic properties ; Pt/WO3– ; ZrO2 catalysts
• 刊名：Catalysis Letters
• 出版年：2000
• 出版时间：2000
• 年：2000
• 卷：65
• 期：4
• 页码：205-208
• 全文大小：KB

文摘

The influence of the crystalline structure of ZrO$\_\{2\}$ on the metallic properties of Pt, when supported on WO$\_\{3\}$–ZrO$\_\{2\}$, was studied. Pt supported on tetragonal zirconia loses its metallic properties while when supported on monoclinic zirconia it presents good metallic activities. WO$\_\{4\}^\{2-\}$ deposited on amorphous Zr(OH)$\_\{4\}$ before calcination generates an active material for $n$‐butane isomerization. The larger the fraction of the tetragonal phase of zirconia in this material, the higher the isomerization activity and the lower the metallic activity of Pt.