Azobenzene Decorated NbO-Type Metal–Organic Framework for High-Capacity Storage of Energy Gases

Abstract

Herein, a microporous NbO-type framwork (<b>FJI-H23</b>) that showed outstanding surface area (3740.4 m²·g^-1) was fabricated by utilizing an azobenzene-derived carboxylate ligand. As anticipated, <b>FJI-H23</b> can store 2.35 wt % H₂ at 77 K up to 1 bar. Furthermore, <b>FJI-H23</b> exhibits high-capacity storage of C2 and C3 hydrocarbons at room temperature. Especially, the uptake amount of C₃H₈ is 325.76 cm³·g^-1 at 298 K, which represents the new record of C₃H₈ adsorption capacity in the MOFs materials. In addition, <b>FJI-H23</b> exhibits excellent gravimetric total uptake of 332 cm³·g^-1 at 298 K and 65 bar.