催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (3): 182-184.

• 研究快讯 • 上一篇    下一篇

组合纳米Pt/C催化剂的邻氯硝基苯加氢性能

毛建忠, 严新焕, 顾辉子, 江玲超   

  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:2009-03-25 出版日期:2009-03-25 发布日期:2012-12-19

Hydrogenation of o-Chloronitrobenzene by Platinum Nanoparticles on Activated Carbon

MAO Jianzhong, YAN Xinhuan*, GU Huizi, JIANG Lingchao   

  1. State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
  • Received:2009-03-25 Online:2009-03-25 Published:2012-12-19

PDF

1092

被引次数

67

摘要： 通过金属有机化合物Pt2(dba)3 (dba为二亚苄基丙酮)分解的方法, 制得了可溶性纳米Pt颗粒. 采用透射电子显微镜对其观察发现, 调节氢气分解压力可以控制Pt颗粒的大小. 将可溶性Pt纳米颗粒负载于活性炭上, 制得了粒径可控的Pt/C催化剂. 该催化剂用于邻氯硝基苯加氢反应时, 表现出非常高的催化性能. 在氢气分解压力为2.0 MPa时制备的0.5% Pt/C, 其Pt纳米粒径为2.8 nm左右, 在不加脱卤抑制剂、反应温度为60 oC和氢气压力为1.0 MPa的条件下, 脱卤率为1.6%, TOF达到39.8 s-1.

关键词: 铂, 活性炭, 负载型催化剂, 邻氯硝基苯, 加氢, 氢解

Abstract: Pt nanoparticles were prepared by decomposing Pt2(dba)3 at H2 pressure of 0.5–2.0 MPa. The size of the Pt nanoparticles decreased from 11.5 to 2.8 nm with increasing decomposition pressure from 0.5 to 2.0 MPa. The catalyst decomposed at higher pressure exhibited higher activity and lower selectivity.

Key words: platinum, activated carbon, supported catalyst, o-chloronitrobenzene, hydrogenation, hydrogenolysis