The potential of organic polymer-based hydrogen storage materials

Research output: Contribution to journalArticle

Authors

  • PM Budd
  • A Butler
  • J Selbie
  • K Mahmood
  • NB McKeown
  • B Ghanem
  • K Msayib

Colleges, School and Institutes

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% H(2) by mass at 10 bar/77 K. HyperCrosslinked Polymers (HCPs) also show promising performance as H(2) storage materials, particularly at pressures >10 bar. The N(2) and H(2) adsorption behaviour at 77 K of six PIMs and a HCP are compared. Surface areas based on Langmuir plots of H(2) 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 H(2) uptake. The micropore distribution influences the form of the H(2) isotherm, a higher concentration of ultramicropores (pore size

Details

Original languageEnglish
Pages (from-to)1802-1808
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume9
Issue number15
Publication statusPublished - 1 Jan 2007