催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (1): 90-94.

• 研究论文 • 上一篇    下一篇

高效组合型 Pd/C 催化剂用于 Suzuki 偶联反应

黄钟斌, 严新焕, 江玲超, 蒋虹   

  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, 浙江杭州 310014
  • 收稿日期:2010-01-25 出版日期:2010-01-25 发布日期:2010-01-25

Efficient Assembled Pd/C Catalyst Applied in Suzuki Coupling Reactions

HUANG Zhongbin, YAN Xinhuan*, JIANG Lingchao, JIANG Hong   

  1. State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
  • Received:2010-01-25 Online:2010-01-25 Published:2010-01-25

PDF

1778

被引次数

55

摘要： 采用有机金属 Pd2(dba)3 (dba 为二亚苄基丙酮) 还原分解法制得均匀分布的 Pd 纳米颗粒 (粒径为 3~6 nm) 混合液, 并用活性炭直接吸附得到了组合型 Pd/C 纳米催化剂. 采用透射电子显微镜、X 射线光电子能谱和 X 射线衍射等手段测定了催化剂表面 Pd 颗粒大小分布、晶型和化学态等. 将该催化剂用于 Suzuki 碳-碳偶联反应, 其催化活性比浸渍法制备的 Pd/C 催化剂高 2 倍以上. 以溴代芳烃为底物时, 在 80 oC 下 0.5 h 后偶联产物收率可达 98% 以上. 以邻氯硝基苯为底物时, 在 110 oC 下 1 h 后偶联产物收率可达 64%; 延长反应时间, 产物收率可达 90% 以上.

关键词: 钯, 纳米颗粒, 活性炭, 负载型催化剂, 溴代芳烃, 氯代芳烃, Suzuki 反应

Abstract: The Pd nanoparticles with diameters of 3–6 nm were obtained by the decomposition of Pd2(dba)3 (dba = dibenzalacetone). They were captured by activated carbon directly to prepare the assembled Pd/C catalyst. Transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction were used to characterize the size, distribution, and electronic state of Pd nanoparticles. This assembled catalyst showed extraordinary properties in Suzuki coupling reaction, which was over twice than the Pd/C catalyst prepared by the impregnation method. Under the conditions of 80 oC and 0.5 h, the catalyst can catalyze Suzuki reactions of aryl bromide with a coupling product yield of 98%. The assembled Pd/C catalyst can also catalyze the reaction of o-chloronitrobenzene with a yield of 64% in 1 h when the reaction temperature was 110 oC, and the yield can be higher than 90% with extending the reaction time.

Key words: palladium, nanoparticle, activated carbon, supported catalyst, aryl bromide, aryl chloride, Suzuki reaction