From Boron Organic Polymers to in situ Ultrafine Nano Pd and Pt: Green Synthesis and Application for High Efficiency Hydrogen Evolution

Graphical A closo case : In situ preparation of ultrafine Pd and Pt nanoparticles on dodecahydro-closo-dodecaborate organic polymers for high efficiency catalytic hydrolytic dehydrogenation of ammonia borane. Using in situ reduction strategy by combining organic frameworks and ultrafine Pd and Pt nanoparticles (Pd−NPs and Pt−NPs) to synthesize composites with tunable morphology and high dispersion has attracted extensive attentions in fabrication of composite nanomaterials. Herein, on the new kind of substrate, BOPs@Pd and BOPs@Pt nano materials have been successfully fabricated via in situ reduction of Na 2 PdCl 4 and H 2 PtCl 6 triggered by reducibility of organic boron polymers (BOPs). The final products are obtained by loading Pd−NPs and Pt−NPs with ultra-small size and high dispersion without any tedious chemical modification or additional additives. These materials show high catalytic activity and recyclability in the hydrolysis dehydrogenation of ammonia borane (AB).