A Covalent Organic Framework that Exceeds the DOE 2015 Volumetric Target for H-2 Uptake at 298 K

作者：Mendoza Cortes Jose L; Goddard William A III^*; Furukawa Hiroyasu; Yaghi Omar M

来源：Journal of Physical Chemistry Letters, 2012, 3(18): 2671-2675.

DOI：10.1021/jz301000m

Physisorption in porous materials is a promising approach for meeting H-2 storage requirements for the transportation industry, because it is both fully reversible and fast at mild conditions. However, most current candidates lead to H-2 binding energies that are too weak (leading to volumetric capacity at 298 K of <10 g/L compared to the DOE 2015 Target of 40 g/L). Using accurate quantum mechanical (QM) methods, we studied the H-2 binding energy to 48 compounds based on various metalated analogues of five common linkers for covalent organic frameworks (COFs). Considering the first transition row metals (Sc though Cu) plus Pd and Pt, we find that the new COF-301-PdCl2 reaches 60 g total H-2/L at 100 bar, which is 1.5 times the DOE 2015 target of 40 g/L and close to the ultimate (2050) target of 70 g/L. The best current materials, MOF-200 and MOF-177, are predicted to store 7.6 g/L (0.54 wt % excess) and 9.6 g/L (0.87 wt % excess), respectively, at 298 K and 100 bar compared with 60 g/L (4.2 wt % excess) for COF-301-PdCl2.

• 出版日期2012-9-20