Oxide-Supported Palladium and Gold Nanoparticles for Catalytic C-H Transformations

Abstract

C-H transformations catalyzed by heterogeneous Pd and Au catalysts are disclosed. For palladium, Pd(0), PdO, and Pd(OH)₂ worked as catalytically active species involved in oxidative addition, electrophilic substitution, and concerted metalation deprotonation pathways depending on the reaction under investigation. We also found that Au(0) nanoparticles catalyzed C-H coupling and discuss the difference in catalytic properties between Pd and Au. The role of metal oxide (MO_x) supports is also mentioned: MO_x not only stabilizes Pd and Au particles but also creates cationic metal sites at the perimeter interface, and these play an important role in activating the substrates.