Facile syntheses of palladium nanoparticles encapsulated in metal-organic frameworks and their catalytic properties

【Author】

Rong Cao;Yuanbiao Huang;

【Abstract】

Metal-organic frameworks (MOFs) have been emerging as very promising functional materials for gas storage, separation, heterogeneous catalysis, sensing, and drug delivery due to their high surface area, porosity, and chemical tunability. Highly dispersed palladium nanoparticles (Pd NPs) encapsulated in metal-organic frameworks (MOFs) MIL-101(Cr), MIL-101(Cr)-NH 2 , MIL-53(Al)-NH 2 have been prepared. The Pd NPs were characterized by powder X-ray diffraction (PXRD), N 2 adsorption, CO chemisorption, transmission electron microscopy (TEM), inductively coupled plasma atomic emission spectroscopy (ICP-AES) and X-ray photoelectron spectroscopy (XPS). The particle sizes of the obtained Pd NPs are in good agreement with the porous diameters of the host MOFs.The resulting Pd/MIL-101(Cr), Pd/MIL-101(Cr)-NH 2 , and Pd/MIL-53(Al)-NH 2 materials exhibit extremely high catalytic activities in the Suzuki reaction, Heck reaction, direct C2 arylation of indoles, dehalogenation of aryl chlorides under mild conditions. Moreover, the Pd NPs confined in porous MOFs are easily recoverable and can be reused several times without leaching and loss of activity.

【Keywords】

MOFs, Palladium, Nanoparticle, Catalytic Property

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