Hydrogen storage physisorption

Benard, P, R. Chahine, Storage of hydrogen by physisorption on carbon and nanostructured materials. Scr. Mater. 56,803-808,2007. 

Concurrent stream of the development of nanomaterials for solid-state hydrogen storage comes from century-old studies of porous materials for absorption of gasses, among them porous carbon phases, better known as activated carbon. Absorption of gases in those materials follows different principles from just discussed absorption in metals. Instead of chemisorption of gas into the crystalline structure of metals, it undergoes physisorption on crystalline surfaces and in the porous structure formed by crystals. The gases have also been known to be phy-sisorbed on fine carbon fibers. 

T. Heine, L. Zhechkov, G. Seifert, Hydrogen storage by physisorption of nanostructured graphite platelets. Phys. Chem. Chem. Phys., 6 (2004) 980-984. 

Figure 5.2 The six basic hydrogen storage methods and phenomena. From top left to bottom right compressed gas (molecular H2) liquid hydrogen (molecular H2) physisorption (molecular H2) on materials,forexample, carbon with a very large specific surface area hydrogen (atomic H) intercalation in host metals,...

M.G. Nijkamp, J.E.MJ. Raaymakers, A.J. van Dillen, K.P. de Jong, Hydrogen storage using physisorption-materials demands. Appl. Phys. A, 72 (2001) 619-623. 

Figure 8. Volume capacity of hydrogen storage using physisorption at pressure 6 MPa for active carbon materials and different temperatures.

Nijkamp M.G., Raaymakers J.E.M.J., van Dillen A.J., de Jong K.P. (2001) Hydrogen storage using physisorption - materials demands. Applied Physics A. Materials Science Processing. A72, 619-623. 

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