ReOx/TiO2: A Recyclable Solid Catalyst for Deoxydehydration

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• 作者：Lennart Sandbrink ; Elisabeth Klindtworth ; Husn-Ubayda Islam ; Andrew M. Beale ; Regina Palkovits
• 刊名：ACS Catalysis
• 出版年：2016
• 出版时间：February 5, 2016
• 年：2016
• 卷：6
• 期：2
• 页码：677-680
• 全文大小：321K
• ISSN：2155-5435

文摘

Deoxydehydration (DODH) enables the transformation of two adjacent hydroxyl functions into a C–C double bond: e.g., facilitating synthesis of 1,3,5-hexatriene from sorbitol. Here we report the first stable heterogeneous catalyst for DODH based on ReO_x supported on TiO₂. ReO_x/TiO₂ exhibits not only catalytic activity and selectivity comparable to those of previously described molecular rhenium catalysts but also excellent stability without deactivation over at least six consecutive runs. X-ray absorption spectroscopy (XAFS) measurements indicate a mixture of Re(VII), Re(IV), and Re(0) species at a ratio of 0.47:0.27:0.25, remaining comparatively stable during catalysis.