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Novel Organometallic Fullerene Complexes for Vehicular Hydrogen Storage

  • Erin Whitney (a1), Anne C. Dillon (a2), Calvin Curtis (a3), Chaiwat Engtrakul (a4), Kevin O'Neill (a5), Mark Davis (a6), Lin Simpson (a7), Kim Jones (a8), Yufeng Zhao (a9), Yong-Hyun Kim (a10), Shengbai Zhang (a11) and Philip Parilla (a12)...

Abstract

Experimental wet chemical approaches have been demonstrated in the synthesis of a new chainlike (C60-Fe-C60-Fe)n complex. This structure has been proposed based on 13C solid-state nuclear magnetic resonance, electron paramagnetic resonance, high-resolution transmission electron microscopy, energy-dispersive spectroscopy, and X-ray diffraction. Furthermore, this structure has been shown to have unique binding sites for dihydrogen molecules with the technique of temperature-programmed desorption. The new adsorption sites have binding energies that are stronger than that observed for hydrogen physisorbed on planar graphite, but significantly weaker than a chemical C-H bond. Volumetric measurements at 77 K and 2 bar show a hydrogen adsorption capacity of 0.5 wt%. Interestingly, the BET surface area is ∼31 m2/g after degassing, which is approximately an order of magnitude less than expected given the measured experimental hydrogen capacity. Nitrogen and hydrogen isotherms performed at 75 K also show a marked selectivity for hydrogen over nitrogen for this complex, indicating hidden surface area for hydrogen adsorption.

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Keywords

Novel Organometallic Fullerene Complexes for Vehicular Hydrogen Storage

  • Erin Whitney (a1), Anne C. Dillon (a2), Calvin Curtis (a3), Chaiwat Engtrakul (a4), Kevin O'Neill (a5), Mark Davis (a6), Lin Simpson (a7), Kim Jones (a8), Yufeng Zhao (a9), Yong-Hyun Kim (a10), Shengbai Zhang (a11) and Philip Parilla (a12)...

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