不同载体负载的铂催化剂在丙酮酸乙酯不对称氢化反应中的活性及其铂流失率比较

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (4): 761.

不同载体负载的铂催化剂在丙酮酸乙酯不对称氢化反应中的活性及其铂流失率比较

王红娜, 沈亚丽, 李博, 李晓红, 吴鹏

华东师范大学化学系, 上海市绿色化学与化工过程绿色化重点实验室, 上海 200062

收稿日期:2009-07-31 出版日期:2010-04-10 发布日期:2010-04-10
通讯作者: 李晓红, 女, 博士, 副研究员, 主要从事多相不对称催化研究. E-mail: xhli@chem.ecnu.edu.cn
基金资助:
国家自然科学基金(批准号: 20703018)、国家“九七三”计划项目(批准号: 2006CB202508)和上海市科委青年科技启明星人才计划项目(批准号: 08QA1402700)资助.

Comparison of Catalytic Performance and Stability for Pt Catalysts Supported on Different Materials in Chiral Hydrogenation of Ethyl Pyruvate

WANG Hong-Na, SHEN Ya-Li, LI Bo, LI Xiao-Hong*, WU Peng

Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062, China

Received:2009-07-31 Online:2010-04-10 Published:2010-04-10
Contact: LI Xiao-Hong. E-mail: xhli@chem.ecnu.edu.cn
Supported by:
国家自然科学基金(批准号: 20703018)、国家“九七三”计划项目(批准号: 2006CB202508)和上海市科委青年科技启明星人才计划项目(批准号: 08QA1402700)资助.

摘要/Abstract

摘要：

以介孔树脂材料FDU-14和介孔碳材料CMK-3为载体制备了两种负载型铂催化剂, 用N₂气吸附、X射线衍射及CO化学吸附等手段对这两种催化剂进行了表征, 并将这两种不同的负载型铂催化剂在丙酮酸乙酯不对称氢化反应中的催化性能及其铂流失率与商品化Pt/Al₂O₃催化剂进行了比较. 研究结果表明, 尽管Pt/Al₂O₃催化剂的初始活性和光学选择性均较高, 然而相同反应条件下乙酸溶剂中Pt/FDU-14和Pt/CMK-3催化剂的铂流失率比Pt/Al₂O₃催化剂的低. 通过对催化剂进行CO吸附原位傅里叶变换红外漫反射光谱(DRIFTS)表征, 从载体的不同表面电子性质角度解释了不同载体负载的铂催化剂在丙酮酸乙酯不对称氢化反应中的活性和铂流失率的差异.

关键词: Pt/FDU-14催化剂; Pt/CMK-3催化剂; 丙酮酸乙酯; 不对称氢化; 铂流失率

Abstract:

5.0%(mass fraction) Pt catalysts supported on periodic mesoporous resols(FDU-14) and ordered mesoporous carbon materials(CMK-3) were prepared using a wet impregnation method, respectively. The ca-talytic performances of Pt/FDU-14 and Pt/CMK-3 catalysts in the asymmetric hydrogenation of ethyl pyruvate were compared with the commercial Pt/Al₂O₃ catalyst. Although the commercial Pt/Al₂O₃ catalyst affords the highest initial activity and enantioselectivity, the Pt/FDU-14 and Pt/CMK-3 catalysts are superior to Pt/Al₂O₃ in immobilization of platinum under the same conditions. Based on the chemical nature of different supports, the difference in the catalytic performance and stability of three supported Pt catalysts was interpreted for the enantioselective hydrogenation of ethyl pyruvate.

Key words: Pt/FDU-14 catalyst; Pt/CMK-3 catalyst; Ethyl pyruvate; Asymmetric hydrogenation; Leaching of platinum

TrendMD:

王红娜, 沈亚丽, 李博, 李晓红, 吴鹏. 不同载体负载的铂催化剂在丙酮酸乙酯不对称氢化反应中的活性及其铂流失率比较. 高等学校化学学报, 2010, 31(4): 761.

WANG Hong-Na, SHEN Ya-Li, LI Bo, LI Xiao-Hong*, WU Peng. Comparison of Catalytic Performance and Stability for Pt Catalysts Supported on Different Materials in Chiral Hydrogenation of Ethyl Pyruvate. Chem. J. Chinese Universities, 2010, 31(4): 761.

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