The potential of organic polymer-based hydrogen storage materials

Peter M. Budd*, Anna Butler, James Selbie, Khalid Mahmood, Neil B. McKeown, Bader Ghanem, Kadhum Msayib, David Book, Allan Walton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

167 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1802-1808
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume9
Issue number15
DOIs
StatePublished - Apr 17 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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