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Park, Noejung
Computational Physics & Electronic Structure Lab.
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Optimization of metal dispersion in doped graphitic materials for hydrogen storage

Author(s)
Kim, GyubongJhi, Seung-HoonPark, NoejungLouie, Steven G.Cohen, Marvin L.
Issued Date
2008-08
DOI
10.1103/PhysRevB.78.085408
URI
https://scholarworks.unist.ac.kr/handle/201301/8504
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=49649101522
Citation
PHYSICAL REVIEW B, v.78, no.8, pp.085408
Abstract
The noncovalent hydrogen binding on transition-metal atoms dispersed on carbon clusters and graphene is studied with the use of the pseudopotential density-functional method. It is found that the presence of acceptorlike states in the absorbents is essential for enhancing the metal adsorption strength and for increasing the number of hydrogen molecules attached to the metal atoms. Particular configurations of boron substitutional doping are found to be very efficient for providing such states and thus enhancing storage capacity. Optimal doping conditions are suggested based on our calculations for the binding energy and ratio between metal and hydrogen molecules.
Publisher
AMER PHYSICAL SOC
ISSN
2469-9950
Keyword
MOLECULAR-HYDROGENGRAPHENESBINDINGENERGY

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