Palladium Supported on Commercial Fumed Silica as Sustainable Catalyst for Suzuki-Miyaura Coupling Reactions

Palladium nanocatalysts supported on commercial fumed silica were synthesized via a convenient liquid method without any external reductant or surfactants. The catalysts were characterized by inductively coupled plasma-mass spectrometry, X-ray powder diffraction and the transmission electron microscope analysis. Then it was applied for Suzuki-Miyaura cross-coupling reactions. It was found that a number of aryl halides were efficiently catalyzed using these catalysts in aqueous-ethanol under relatively mild condition within 0.5h. Further study showed that the catalyst could be recycled up to 10 times without loss of activity. Palladium nanocatalysts supported on commercial fumed silica were synthesized and applied for Suzuki-Miyaura cross-coupling reactions. A number of aryl halides were efficiently catalyzed using these catalysts in aqueous-ethanol under relatively mild condition within 0.5h. Further study showed that the catalyst could be recycled up to 10 times without loss of activity.