Carbon nanostructures for hydrogen storage

Gotthard Seifert, Thomas Heine, Lyuben Zhechkov, Agniezka Kuc

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The potential of Carbon structures to store hydrogen has been discussed in the literature very controversially. In this contribution we revisit the capabilities for hydrogen storage in graphite based structures and in carbon nanotubes by calculations of interaction potentials and by computer simulations of the free energies and the equilibrium constants for hydrogen adsorption, considering quantum effects. We have shown that a proper manipulation of the interlayer distance between graphene layers can considerbly increase the free energy of molecular hydrogen adsorption. Therefore, proper ways for such manipulation have to be searched and other carbon forms have to be investigated with this respect. Since the discovery of fullerenes and nanotubes several other new forms of carbon have been found (e.g. onions, diamondoids, peapods) or proposed (e.g. metallic carbon, graphyne, scrolls). In addition to pure sp2 and sp3 systems, there have been investigated also mixed sp2 - sp3 connected structures (e.g. isodiamond-graphite hybrids, vacancies of graphite, carbon foams). Here we consider the increase of the interlayer distance in graphite by fullerene intercalation, the so called carbon foams and a fullerite structure concerning their hydrogen storage potential. These nanostructured carbon modifications exhibit a large accessible internal surface and active volume for molecular hydrogen adsorption. I.e., nanostructured carbon modifications have a considerable potential for physisorptive hydrogen storage.

Original languageEnglish
Title of host publicationAbstracts of Papers - 232nd American Chemical Society Meeting and Exposition
Publication statusPublished - 2006 Dec 1
Event232nd American Chemical Society Meeting and Exposition - San Francisco, CA, United States
Duration: 2006 Sep 102006 Sep 14

Publication series

NameACS National Meeting Book of Abstracts
Volume232
ISSN (Print)0065-7727

Other

Other232nd American Chemical Society Meeting and Exposition
CountryUnited States
CitySan Francisco, CA
Period06/9/1006/9/14

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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  • Cite this

    Seifert, G., Heine, T., Zhechkov, L., & Kuc, A. (2006). Carbon nanostructures for hydrogen storage. In Abstracts of Papers - 232nd American Chemical Society Meeting and Exposition (ACS National Meeting Book of Abstracts; Vol. 232).