Hydrogen Storage in Microporous Metal–Organic Frameworks with Exposed Metal Sites

Abstract

Owing to their high uptake capacity at low temperature and excellent reversibility kinetics, metal-organic frameworks have attracted considerable attention as potential solid-state hydrogen storage materials. In the last few years, researchers have also identified several strategies for increasing the affinity of these materials towards hydrogen, among which the binding of H(2) to unsaturated metal centers is one of the most promising. Herein, we review the synthetic approaches employed thus far for producing frameworks with exposed metal sites, and summarize the hydrogen uptake capacities and binding energies in these materials. In addition, results from experiments that were used to probe independently the metal-hydrogen interaction in selected materials will be discussed.

Stability and Hydrolyzation of Metal Organic Frameworks with Paddle-Wheel SBUs upon Hydration

“…5,6 The high surface areas, porosity and tunable structures make this type of materials very promising for a variety of applications including gas storage, separation, sensing, catalysis and drug delivery. 3,[7][8][9][10][11][12][13][14][15][16] Efforts have been done to explore MOFs as a sorbent for H 2 storage and CO 2 capture materials. H 2 storage in MOFs materials is usually achieved thorough fast physical adsorption onto the surface of pores with a large adsorption capacity.…”

Tuning the plasmon energy of palladium–hydrogen systems by varying the hydrogen concentration

“…Bulk and nanoparticle metal hydrides have been extensively studied due to their importance in many applications such as hydrogen storage [16,17,18,19,20,21]. The novel scheme [8] is based on the modification of the optical properties of nanoparticles, i.e., the shift in energy of the LSP peak, during the H absorption process.…”

Microporous metal-organic framework with potential for carbon dioxide capture at ambient conditions

“…The regeneration energy cost to utilize these porous materials for CO 2 capture by the implementation of temperature swing adsorption, pressure swing adsorption (PSA) and vacuum swing adsorption is significantly lower than the abovementioned alkanolamine technology. More importantly, the rapid development over the past decade in this research field to target some porous MOFs for their extremely high uptake of CO 2 at high pressure 11,12 and to immobilize functional sites, such as open metal sites [13][14][15][16][17][18][19][20][21][22][23] , -NH 2 and -OH organic sites into the pore surfaces to enhance their interactions and thus enforce their efficient CO 2 separation selectivity have principally ensured the feasibility of porous MOFs for CO 2 capture [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] .…”