A polyhedron-based cobalt-organic framework for gas adsorption and separation

• A 3D cobalt-organic framework composed of octahedral cages and trigonal bipyramidal cages was synthesized.
• It exhibits notable H2 and CO2 gas adsorption performance.
• It shows high adsorption selectivity for CO2 over CH4 and N2.

A cobalt-organic framework (1) consisted of close-packed polyhedral cages is isostructural to CPM-35-Ni. The activated sample (1a) can adsorb high H2 uptake of 88.3 cm3 g− 1 (0.79 wt.%) at 77 K and 1.0 bar. Remarkably, 1a shows high CO2 adsorption capacity and good adsorption selectivity for CO2 over CH4 and N2.

Large single crystals of a 3D cobalt-organic framework composed of close-packed polyhedral cages show not only high H2 and CO2 uptakes but also good adsorption selectivity for CO2 over CH4 and N2.Figure optionsDownload as PowerPoint slide