Abstract

Highly monodispersed palladium (Pd) nanoparticles have been successfully incorporated inside the mesopores of a metal–organic framework (MOF), MIL-101, without deposition of Pd nanoparticles on the external surfaces of framework by using the "double solvents" method, in which cyclohexane is used as a hydrophobic solvent to disperse the mesoporous MOF and an aqueous solution of Pd precursor is used as a hydrophilic solvent to fill the mesopores. The resulting Pd @MIL-101 composite is highly catalytically active for the reduction of 4-nitrophenol (4-NPh) by sodium borohydride ( NaBH4 ). The observed excellent catalytic performances are attributed to the small Pd nanoparticles within the pores of MIL-101.

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