Metal-organic frameworks (MOFs) are a new class of inorganic-organic hybrid porous materials emerged in the 1990s. Their highly crystalline coordination networks constructed from inorganic metal clusters and organic bridging ligands are known for high specific internal surface area, large pore volume, tunable pore structure and diverse functionality. Thus they have been extensively studied for gas storage, chemical separation, sensing, heterogeneous catalysis, and drug delivery.Fossil fuel as a non-renewable energy source not only suffers from limit supply, but also produces large amount of CO2 during the combustion process. While the energy crisis and global warming problem getting worse, people are searching for alternative energy source. Hydrogen (H2), which has high energy density as well as green nature, has been proposed to be a promising secondary energy source. The main problem hindering H2 commercialization is storage. Storing H2 under low temperature is energy-consuming. High pressure H2 gas tank requires heavy containers as well as energy for compression. Moreover, chemisorptions of H2 have limited H2 charge/releasing rate and also need large amount of energy for releasing H2.MOFs could adsorb H2 by mild physisorption which provide high storage capacity, fast charge/release as well as low energy demand. BET surface area of MOFs has been shown to be qualitatively linear with their H2 storage capacities. Building MOFs having high surface area thus becomes a sought-after goal. The main strategies include organic linker extension and mix-ligand synthesis. On the other hand, increasing the interactions between the framework and H2 molecules could effectively promote the H2 packing density and storage capacity. This target could be achieved by introducing interpenetrate framework, open metal site, metal cation and spill-over method.

Metal-organic frameworks for H<sub>2</sub> storage

246th National Meeting (2013)

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Metal-organic frameworks for H2 storage

Metal-organic frameworks for H₂ storage