Seattle Children's Hospital Research Institute Sign up for PNAS Online eTocs
Link: Info for AuthorsLink: Editorial BoardLink: AboutLink: SubscribeLink: AdvertiseLink: ContactLink: Sitemap Link: PNAS Home
Proceedings of the National Academy of Sciences
Link: Current Issue "" Link: Archives "" Link: Online Submission ""  Link: Advanced Search

Published online on January 7, 2004, 10.1073/pnas.0307449100
PNAS | January 20, 2004 | vol. 101 | no. 3 | 708-710


This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a colleague
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My File Cabinet
Right arrow Download to citation manager
Right arrow Request Copyright Permission
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via ISI Web of Science (48)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Mao, W. L.
Right arrow Articles by Mao, H.-k.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Mao, W. L.
Right arrow Articles by Mao, H.-k.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg  
What's this?

 Previous Article  | Table of Contents |  Next Article 

From the Cover
APPLIED PHYSICAL SCIENCES
Hydrogen storage in molecular compounds

Wendy L. Mao * {dagger}, and Ho-kwang Mao {ddagger}

*Department of the Geophysical Sciences, University of Chicago, Chicago, IL 60637; and {ddagger}Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015

Contributed by Ho-kwang Mao, November 13, 2003

At low temperature (T) and high pressure (P), gas molecules can be held in ice cages to form crystalline molecular compounds that may have application for energy storage. We synthesized a hydrogen clathrate hydrate, H2(H2O)2, that holds 50 g/liter hydrogen by volume or 5.3 wt %. The clathrate, synthesized at 200–300 MPa and 240–249 K, can be preserved to ambient P at 77 K. The stored hydrogen is released when the clathrate is warmed to 140 K at ambient P. Low T also stabilizes other molecular compounds containing large amounts of molecular hydrogen, although not to ambient P, e.g., the stability field for H2(H2O) filled ice (11.2 wt % molecular hydrogen) is extended from 2,300 MPa at 300 K to 600 MPa at 190 K, and that for (H2)4CH4 (33.4 wt % molecular hydrogen) is extended from 5,000 MPa at 300 K to 200 MPa at 77 K. These unique characteristics show the potential of developing low-T molecular crystalline compounds as a new means for hydrogen storage.

{dagger} To whom correspondence should be addressed at: Department of the Geophysical Sciences, University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60637. E-mail: wmao{at}uchicago.edu.


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg    What's this?


This article has been cited by other articles in HighWire Press-hosted journals:


Home page
 Proc. Natl. Acad. Sci. USAHome page
Y. Zhao, H. Xu, L. L. Daemen, K. Lokshin, K. T. Tait, W. L. Mao, J. Luo, R. P. Currier, and D. D. Hickmott
High-pressure/low-temperature neutron scattering of gas inclusion compounds: Progress and prospects
PNAS, April 3, 2007; 104(14): 5727 - 5731.
[Abstract] [Full Text] [PDF]

Home page
 ScienceHome page
L. J. Florusse, C. J. Peters, J. Schoonman, K. C. Hester, C. A. Koh, S. F. Dec, K. N. Marsh, and E. D. Sloan
Stable Low-Pressure Hydrogen Clusters Stored in a Binary Clathrate Hydrate
Science, October 15, 2004; 306(5695): 469 - 471.
[Abstract] [Full Text] [PDF]