Pt@MOF-177: Synthesis, Room-Temperature Hydrogen Storage and Oxidation Catalysis

摘要

The gas-phase loading of [Zn4O(btb)(2)](8) (MOF-177: H(3)btb = 1,3,5-benzenetribenzoic acid) with the volatile platinum precursor [Me3PtCp'] (Cp'=methylcyclopentadienyl) was confirmed by solid state C-13 magic angle spinning (MAS)-NMR spectroscopy. Subsequent reduction of the inclusion compound [Me3PtCp'](4)@MOF-177 by hydrogen at 100 bar and 100 degrees C for 24 h was carried out and gave rise to the formation of platinum nanoparticles in a size regime of 2-5 nm embedded in the unchanged MOF-177 host lattice as confirmed by transmission electron microscopy (TEM) micrographs and powder X-ray diffraction (PXRD). The room-temperature hydropen adsorption of Pt@MOF-177 has been followed in it gravimetric fashion (magnetic suspension balance) and shows almost 2.5 wt% in the first cycle. but is decreased down to 0.5 wt% in consecutive cycles. The catalytic activity of Pt@MOF-177 towards the solvent- and base-free room temperature oxidation of alcohols in air has been tested and shows Pt@MOF-177 to be an efficient catalyst in the oxidation of alcohols.