Palladium Nanoparticles Supported on Mixed-Linker Metal-Organic Frameworks as Highly Active Catalysts for Heck Reactions

Well‐dispersed palladium nanoparticles (Pd NPs) supported on amine‐functionalized, mixed‐linker metal–organic frameworks (MIXMOFs) based on MIL‐53(Al) were prepared by using the ion‐exchange method. Pd NPs were characterized by powder X‐ray diffraction (XRD), N2 adsorption, transmission electron microscopy (TEM), inductively coupled plasma atomic emission spectroscopy (ICP‐AES), and X‐ray photoelectron spectroscopy (XPS). The mean diameter of Pd NPs is approximately 3.2 nm. It was found that the Pd NPs supported on amine‐functionalized MIXMOFs are stable at high temperature. The Pd NPs exhibit efficient catalytic activity for Heck reaction and can be easily recovered and reused. Like a MOF to a flame: A facile ion‐exchange approach for the preparation of palladium nanoparticle (Pd NP) catalysts supported on amine‐functionalized, mixed‐linker metal–organic frameworks based on MIL‐53(Al) has been developed. These well‐dispersed Pd NPs drastically enhance N2 adsorption and show high activity and selectivity for Heck reactions (see scheme). The Pd NPs catalysts exhibit high stability and can be easily recovered and reused.