Titanium-decorated carbon nanotubes as a potential high-capacity hydrogen storage medium.
Taner Yildirim,Salim Ciraci +1 more
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A first-principles study demonstrates that a single Ti atom coated on a single-walled nanotube (SWNT) binds up to four hydrogen molecules, and shows that a SWNT can strongly adsorb up to 8 wt % hydrogen.Abstract:
We report a first-principles study, which demonstrates that a single Ti atom coated on a single-walled nanotube (SWNT) binds up to four hydrogen molecules. The first H2 adsorption is dissociative with no energy barrier while the other three adsorptions are molecular with significantly elongated H-H bonds. At high Ti coverage we show that a SWNT can strongly adsorb up to 8 wt % hydrogen. These results advance our fundamental understanding of dissociative adsorption of hydrogen in nanostructures and suggest new routes to better storage and catalyst materials.read more
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