Conversion of Isobutene and Formaldehyde to Diol using Praseodymium-Doped CeO2 Catalyst

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• 作者：Zhixin Zhang ; Yehong Wang ; Jianmin Lu ; Chaofeng Zhang ; Min Wang ; Mingrun Li ; Xuebin Liu ; Feng Wang
• 刊名：ACS Catalysis
• 出版年：2016
• 出版时间：December 2, 2016
• 年：2016
• 卷：6
• 期：12
• 页码：8248-8254
• 全文大小：505K
• ISSN：2155-5435

文摘

Conversion of low-carbon olefins to higher alcohols or olefins via the formation of C–C bonds is an increasingly important topic. We herein report an example of converting isobutene and formaldehyde (38 wt % aqueous solution) to 3-methyl-1,3-butanediol (MBD), a precursor for isoprene. The reaction occurs through a Prins condensation–hydrolysis reaction over a praseodymium (Pr)-doped CeO₂ catalyst. The best MBD yield (70%) is achieved over the Pr-doped CeO₂ catalyst. Catalyst characterizations with high-angle annular dark field transmission electron microscopy (HAADF-TEM), pyridine adsorption infrared (IR) and Raman spectroscopy, and density functional theory (DFT) calculations show that the doped Pr is uniformly and highly dispersed in the CeO₂ crystalline phase. In addition, the Pr doping creates more oxygen vacancy sites on CeO₂ and thus enhances the Lewis acidity of the catalyst, which is responsible for the catalytic performance of the Pr-CeO₂ catalyst.