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American Chemical Society's Weekly PressPac -- April 16, 2008
Date:4/21/2008


Email: peppas@che.utexas.edu

ARTICLE #2 FOR IMMEDIATE RELEASE

Silicon nanotubes for hydrogen storage in fuel cell vehicles
Journal of Physical Chemistry C

After powering the micro-electronics revolution, silicon could carve out an important new role in speeding the debut of ultra-clean fuel cell vehicles powered by hydrogen, researchers in China suggest. Their calculations show for the first time that silicon nanotubes can store hydrogen more efficiently than their carbon nanotube counterparts. The study will appear in the April 24 issue of ACS Journal of Physical Chemistry C, a weekly publication.

Dapeng Cao and colleagues note that researchers have focused on the potential use of carbon nanotubes for storing hydrogen in fuel cell vehicles for years. Despite nanotubes great promise, they have been unable to meet the hydrogen storage goals proposed by the U.S. Department of Energy for hydrogen fuel cell vehicles. A more efficient material for hydrogen storage is needed, scientists say.

In the study, Caos group used powerful molecular modeling tools to compare the hydrogen storage capacities of newly developed silicon nanotubes to carbon nanotubes. They found that, in theory, silicon nanotubes can absorb hydrogen molecules more efficiently than carbon nanotubes under normal fuel cell operating conditions. The calculations pave the way for tests to determine whether silicon nanotubes can meet government standards for hydrogen storage, the scientists note. MTS

ARTICLE #2 FOR IMMEDIATE RELEASE
Silicon Nanotube as a Promising Candidate for Hydrogen Storage: From the First Principle Calculations to Grand Canonical Monte Carlo Simulations

DOWNLOAD FULL TEXT ARTICLE
http://dx.doi.org/10.1021/jp711754h

CONTACT:
Dapeng Cao, Ph.D.
Beijing University o
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Contact: Michael Woods
m_woods@acs.org
202-972-4400
American Chemical Society
Source:Eurekalert  

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