物理化学学报 >> 2009, Vol. 25 >> Issue (11): 2270-2274.doi: 10.3866/PKU.WHXB20091106

研究论文 上一篇    下一篇

聚乙二醇稳定的RuB非晶态纳米催化剂对吡啶及其衍生物加氢反应

张晔, 樊光银, 王磊, 李瑞祥, 陈华, 李贤均   

  1. 四川大学化学学院, 教育部绿色化学与技术重点实验室, 成都 610064|赤峰学院化学系, 内蒙古 赤峰 024000
  • 收稿日期:2009-04-28 修回日期:2009-08-26 发布日期:2009-10-28
  • 通讯作者: 李瑞祥 E-mail:sculiruixiang@163.com

Hydrogenation of Pyridine and Its Derivates Catalyzed by Poly(ethylene glycol)-Stabilized Amorphous RuB Nanoparticles

ZHANG Ye, FAN Guang-Yin, WANG Lei, LI Rui-Xiang, CHEN Hua, LI Xian-Jun   

  1. Key Laboratory of Green Chemistry and Technology of the Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China|College of Chemistry, Chifeng University, Chifeng 024000, Inner Mongolia, P. R. China
  • Received:2009-04-28 Revised:2009-08-26 Published:2009-10-28
  • Contact: LI Rui-Xiang E-mail:sculiruixiang@163.com

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摘要：

制备了聚乙二醇(PEG)稳定的RuB非晶态纳米催化剂, 采用X射线衍射(XRD)、X射线光电子能谱(XPS)和透射电镜(TEM)对催化剂进行表征. 结果表明, RuB以高分散态存在, 其平均粒径为2.4 nm. 该催化剂体系对吡啶及其衍生物显示了优异的催化活性和选择性. 在100 ℃、氢气压力3.0 MPa, 催化剂与底物的摩尔比为1/670的条件下, 反应60 min, 催化吡啶加氢的转化率大于99.0%, 生成哌啶的选择性为100%. 对含不同取代基的底物的加氢反应活性顺序如下: 2-甲基吡啶>2,6-二甲基吡啶>吡啶.

关键词: 加氢, RuB非晶态合金, 聚乙二醇, 吡啶, 哌啶

Abstract:

Poly(ethylene glycol) (PEG)-stabilized amorphous RuB nanoparticles were prepared and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). Results showed that Ru was reduced to zero valence and the average particle diameter of the RuB crystallites was about 2.4 nm. This catalytic system shows excellent activity and selectivity for the hydrogenation of pyridine and its derivates. At a reaction temperature of 100 ℃, a hydrogen pressure of 3.0 MPa, a reaction time of 60 min and using a molar ratio of 1/670 Ru to pyridine, the conversion of pyridine was found to be >99.0%and the selectivity for piperidine was 100%. The activity of the catalyst for substrates with different substituents was as follows: 2-methylpyridine>2,6-dimethylpyridine>pyridine.

Key words: Hydrogenation, Amorphous RuB, Poly(ethylene glycol), Pyridine, Piperidine