High Volumetric Hydrogen Storage Capacity using Interpenetrated Metal–Organic Frameworks

Abstract Metal–organic frameworks with extremely large specific surface areas can reach very high gravimetric hydrogen storage capacities. However, these ultra‐porous materials possess typically a very low density and, therefore, a poor volumetric hydrogen storage capacity. Here we study experimentally the influence of interpenetration on the volumetric and gravimetric hydrogen storage capacity by comparing two metal–organic frameworks of the MFU‐4 family, non‐interpenetrated MFU‐4 l and CFA‐7 with an interpenetrated structure. At 77 K the absolute volumetric hydrogen uptake of CFA‐7 is more than twice that of MFU‐4 l .