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The potential of organic polymer-based hydrogen storage materials

Budd, Peter M., Butler, Anna, Selbie, James, Mahmood, Khalid, McKeown, Neil B., Ghanem, Bader, Msayib, Kadhum, Book, David and Walton, Allan 2007. The potential of organic polymer-based hydrogen storage materials. Physical Chemistry Chemical Physics 9 (15) , pp. 1802-1808. 10.1039/b618053a

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The challenge of storing hydrogen at high volumetric and gravimetric density for automotive applications has prompted investigations into the potential of cryo-adsorption on the internal surface area of microporous organic polymers. A range of Polymers of Intrinsic Microporosity (PIMs) has been studied, the best PIM to date (a network-PIM incorporating a triptycene subunit) taking up 2.7% H2 by mass at 10 bar/77 K. HyperCrosslinked Polymers (HCPs) also show promising performance as H2 storage materials, particularly at pressures >10 bar. The N2 and H2 adsorption behaviour at 77 K of six PIMs and a HCP are compared. Surface areas based on Langmuir plots of H2 adsorption at high pressure are shown to provide a useful guide to hydrogen capacity, but Langmuir plots based on low pressure data underestimate the potential H2 uptake. The micropore distribution influences the form of the H2 isotherm, a higher concentration of ultramicropores (pore size <0.7 nm) being associated with enhanced low pressure adsorption.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Publisher: Royal Society of Chemistry
ISSN: 1463-9076
Last Modified: 19 Mar 2016 23:12

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