物理化学学报 >> 2012, Vol. 28 >> Issue (04): 923-927.doi: 10.3866/PKU.WHXB201202081

催化和表面科学 上一篇    下一篇

高效组合型Pt-Fe/C 催化剂用于肉桂醛选择性加氢反应

赵磊, 许响生, 张凯超, 严新焕   

  1. 浙江工业大学绿色化学合成技术国家重点实验室培育基地, 杭州 310014
  • 收稿日期:2011-10-21 修回日期:2012-01-11 发布日期:2012-03-21
  • 通讯作者: 严新焕 E-mail:xinhuanyan139@hotmail.com

Selective Hydrogenation of Cinnamaldehyde with Efficient Assembled Pt-Fe/C Catalysts

ZHAO Lei, XU Xiang-Sheng, ZHANG Kai-Chao, YAN Xin-Huan   

  1. State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China
  • Received:2011-10-21 Revised:2012-01-11 Published:2012-03-21
  • Contact: YAN Xin-Huan E-mail:xinhuanyan139@hotmail.com

摘要: 采用有机金属化合物Pt2(dba)3 (dba 为二亚苄基丙酮)还原分解法制得均匀分布的Pt 纳米颗粒(粒径在2.0 nm 左右), 直接吸附到经预处理的Fe/C 载体上, 即得到了组合型Pt-Fe/C 催化剂. 采用透射电子显微镜(TEM)、X射线光电子能谱(XPS)和能量散射X射线谱(EDS)等技术表征了催化剂表面Pt 颗粒大小分布, Pt、Fe化学态和催化剂表面元素等. 将该组合型催化剂用于肉桂醛(CAL)选择性加氢反应, 获得了良好的效果, 其催化活性比浸渍法制备的Pt/C 催化剂高1 倍以上. 在60 °C、2.5 h、4.0 MPa H2 反应条件下, 1%(w, 质量分数)Pt-1.5%(w)Fe/C催化剂肉桂醛加氢转化率为99.2%, 肉桂醇(COL)选择性达到85.0%.

关键词: 铂, 铁, 活性炭, 肉桂醛, 肉桂醇, 选择性加氢

Abstract: Platinum nanoparticles (d=2.0 nm) were obtained by decomposition of Pt2(dba)3 (dba: dibenzalacetone) and captured by active carbon modified with Fe to prepare a Pt-Fe/C catalyst. Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and energy dispersive X-ray spectrometry (EDS) were used to characterize the size, distribution, electronic state of the Pt and Fe nanoparticles, and surface elements of the catalysts. The catalysts selectively hydrogenated cinnamaldehyde (CAL) to cinnamyl alcohol (COL), and the activity was more than one time that of a Pt/C catalyst prepared by the impregnation method. The 1% (w, mass fraction)Pt-1.5% (w)Fe/C catalyst exhibited the highest activity and selectivity at 60 °C, 2.5 h, and 4.0 MPa H2. The conversion for CAL was 99.2%, and the selectivity of CAL to COL was 85.0%.

Key words: Pt, Fe, Active carbon, Cinnamaldehyde, Cinnamyl alcohol, Selective hydrogenation

MSC2000: 

  • O643