▎ 摘　　要

Pt-doped MOF/graphene oxide (GO) composites were synthesized via a colloidal Pt nanoparticle (NP) incipient-wetness impregnation method for the first time. The composites Pt@HKUST-1/GO and Pt@ZIF-8/GO were characterized by X-ray diffraction, electron microscopy and gas adsorption. The hydrogen uptakes of both composites at 298 K and 860 mm Hg were enhanced by a factor of 3.6 or 4.1 compared to MOFs, although Pt NPs were obviously aggregated throughout MOF/GO networks. This significant enhancement is mainly attributed to the combination of high porosities of MOF/GO supports and hydrogen spillover mechanism, in which Pt NPs and MOF/GO act as dissociation source and receptor, respectively. (C) 2015 Elsevier B.V. All rights reserved.