Abstract
A very simple and facile method to synthesize Pt nanoparticles (NPs) deposited on Pt-bpy metal-organic complexes (bpy =4, 4’-bipyridyl) has been developed. No additional capping agents or solid supports are required. The formation of Pt NPs-bpy composites was largely dependent on the molar ratio of metal to bpy. When the molar ratio of Pt to bpy is more than 1:2, Pt NPs were deposited onto the surface of the formed Pt-bpy complexes. This was demonstrated by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. When the molar ratio of Pt to bpy is less than or equal to 1:2, Pt NPs are difficult to form. Moreover, the Pt NPs-bpy composites were used as a heterogeneous catalyst toward the hydrogenation reaction of the nitroarenes bearing different steric and electronic groups. The catalyst could be recycled for at least 6 cycles without catalytic activity loss.
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