Hydrogen adsorption in metal organic frameworks by hydrogen spillover

A bi-organic-ligand type of Zn-2(bdc)(2)dabco MOFs was synthesized and characterized in the present work. The catalytic properties of Pt/AC and Pd/AC were studied for hydrogen spillover in Zn-2(bdc)(2)dabco modified by 5.0 wt.% of catalyst. The hydrogen adsorption capacity of modified Zn-2(bdc)(2)dabco was significantly enhanced up to 3.35 wt.% by using the secondary spillover with carbon bridges measured at 1.5 bar and 77 K. Moreover, the prepared MOFs were also identified using FE-SEM, HR-TEM, XRD, XANES/EXAFS, and BET N-2 adsorption isotherms techniques. (C) 2010 Elsevier B. V. All rights reserved.