ZIF-8原位负载Pd纳米粒子及其在Suzuki-Miyaura反应中的应用(英文)

In Situ Preparation of Palladium Nanoparticles Supported on ZIF-8 for Suzuki-Miyaura Reaction

将PdCl2与ZIF-8的反应原料ZnO和2-甲基咪唑按照一定的比例,采用机械化学法原位将Pd2+负载在ZIF-8上(Pd2+/ZIF-8)。然后用NaBH4将Pd2+/ZIF-8进行还原,得到均匀分散的Pd纳米颗粒(Pd/ZIF-8)。通过XRD、N2吸附、透射电镜、ICP-AES、XPS等对Pd/ZIF-8的结构、形貌、价态等进行了表征。结果表明用机械化学法原位制备的Pd/ZIF-8具有分散均匀、容易大量制备的优点。该催化剂不仅能高效催化Suzuki-Miyaura交叉偶联反应,并且能够多次循环利用。

Highly dispersed palladium nanoparticles （Pd NPs） supported on zeolitic imidazolate frameworks （ZIFs） ZIF-8 （Pd/ZIF-8） have been prepared in situ via mechanochemical method. The Pd/ZIF-8 frameworks were characterized by XRD, N2 adsorption, TEM, ICP-AES and XPS. The results show that bulk production of highly dispersed palladium nanoparticles can be achieved by mechanochemical method. Moreover, the obtained Pd/ZIF- 8 exhibits high activity for Suzuki-Miyaura cross-coupling reaction and can be easily recovered and reused.