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Novel Organometallic Fullerene Complexes for Vehicular Hydrogen Storage

Published online by Cambridge University Press:  01 February 2011

Erin Whitney ,
Anne C. Dillon ,
Calvin Curtis ,
Chaiwat Engtrakul ,
Kevin O'Neill ,
Mark Davis ,
Lin Simpson ,
Kim Jones ,
Yufeng Zhao  and
Yong-Hyun Kim
...Show all authors
Erin Whitney
Affiliation:
[email protected], National Renewable Energy Laboratory, Energy Sciences, 1617 Cole Blvd, Golden, CO, 80401, United States
Anne C. Dillon
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Calvin Curtis
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Chaiwat Engtrakul
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Kevin O'Neill
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Mark Davis
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Lin Simpson
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Kim Jones
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Yufeng Zhao
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Yong-Hyun Kim
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Shengbai Zhang
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
Philip Parilla
Affiliation:
[email protected], National Renewable Energy Laboratory, Golden, CO, 80401, United States
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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.

Keywords

nanostructureFeadsorption
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1041: Symposium R – Life-Cycle Analysis for New Energy Conversion and Storage Systems , 2007 , 1041-R02-06
Copyright
Copyright © Materials Research Society 2008

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