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Theoretical study of C(60) as catalyst for dehydrogenation in LiBH(4)
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2011 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 22, no 33, 335401- p.Article in journal (Refereed) Published
Abstract [en]

Complex light metal hydrides possess many properties which make them attractive as a storage medium for hydrogen, but typically catalysts are required to lower the hydrogen desorption temperature and to facilitate hydrogen uptake in the form of a reversible reaction. The overwhelming focus in the search for catalysing agents has been on compounds containing titanium, but the precise mechanism of their actions remains somewhat obscure. A recent experiment has now shown that fullerenes (C(60)) can also act as catalysts for both hydrogen uptake and release in lithium borohydride (LiBH(4)). In an effort to understand the involved mechanism, we have employed density functional theory to carry out a detailed study of the interaction between this complex metal hydride and the carbon nanomaterial. Considering a stepwise reduction of the hydrogen content in LiBH(4), we find that the presence of C(60) can lead to a substantial reduction of the involved H-removal energies. This effect is explained as a consequence of the interaction between the BH(x)(-) complex and the C(60) entity.

Place, publisher, year, edition, pages
2011. Vol. 22, no 33, 335401- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-37539DOI: 10.1088/0957-4484/22/33/335401ISI: 000293163400007Scopus ID: 2-s2.0-79961035493OAI: oai:DiVA.org:kth-37539DiVA: diva2:434882
Funder
Swedish Research Council
Note
QC 20110816Available from: 2011-08-16 Created: 2011-08-15 Last updated: 2017-12-08Bibliographically approved

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