CC BY
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V.Ya.Davydov , N.Sheppard and E.Osawa 3
1 Department of Chemistry, Moscow State University, 119899 Moscow, Russia.
E-mail VYaDavydov@phys.chem. msu.ru
2 School of Chemical Sciences, University of East Anglia, Norwich NR4 7TJ, England,
3 Department of Knowledge - Based Information Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Japan
STORAGE OF HYDROGEN IN CHEMISORBED STATE IN AROMATIC COMPOUNDS AND
FULLERENE C60 COMPLEXES WITH PLATINUM
The main difficulty of using hydrogen as a fuel is connected with working out of hydrogen storage system. One of the possible way of hydrogen storage may be the reversible chemisorption of hydrogen on some adsorbents with immobilized molecules. Hydrogenation and dehydrogenation of aromatic compounds such as benzene, toluene, p-xylene, mesitylene as well naphthalene, anthracene and fullerene C6o chemisorbed on silica-supported platinum were investigated by infrared spectroscopy. The complexes of these compounds with platinum can be easily both hydrogenated under relatively low hydrogen pressure ( less than 1 bar ) and dehydrogenated by evacuation even at ambient temperature. The complexes of these compounds with Pt are quite stable and can gain and lose hydrogen many times. Complexes of benzene with platinum can be completely reversible hydrogenated and dehydrogenated at ambient temperature. In the case of other benzene derivatives, polyaromatic compounds and fullerene C60 at dehydrogenation by evacuation the semihydrogenated complexes on platinum remain which can be hydrogenated and dehydrogenated reversibly. The complexes of polyaromatic compounds and fullerene C60 with Pt are more thermostable and exist at more higher temperatures at least at 323 - 373 K. Such complexes can be hydrogenated and dehydrogenated many times at these temperatures. The using of appropriate support adsorbents for the increasing of capacity of hydrogen storage system will be discussed.
fir$- International Scientific Journal for Alternative Energy and Ecology Copyright©2000 by STC "TATA" July 2000, Vol. 1 182
