Hydrogen storage in porous solids with coordinatively-unsaturated metal centers

INOR 934

Steven S. Kaye1, Michael Hartman, michael.hartman@nist.gov2, Vanessa K. Peterson2, Yun Liu2, and Jeffrey R. Long, jrlong@berkeley.edu3. (1) Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, (2) NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, MS 8562, Gaithersburg, MD 20899-8562, (3) Department of Chemistry, University of California, Berkeley, CA 94720-1460
Porous materials containing coordinatively unsaturated metal centers are being explored for use as hydrogen storage materials. In metal-cyanide frameworks with lattice vacancies, such as Fe4[Fe(CN)6]3, as well as in anionic metal-cyanide frameworks with interstitial cations, water occupies some of the coordination sites on the metal cation. This bound water can typically be removed by heating the framework under vacuum, leaving open coordination sites on the metal that can potentially bind hydrogen. The utility of this interaction for gas storage has been studied by measuring the hydrogen and nitrogen sorption capacities of a series of metal-cyanide frameworks containing light-weight metal cations. Powder neutron diffraction studies of these materials in the presence of hydrogen have also been undertaken in order to locate the hydrogen binding sites. Porous materials with functional groups capable of binding electron-rich metal atoms with high metal-dihydrogen bond enthalpies will also be discussed.
 

Materials: Applications
1:30 PM-4:10 PM, Wednesday, 13 September 2006 Moscone Center -- Room 302, Oral

Division of Inorganic Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006