Method for introducing hydrogen into layered nanostructures

C - Chemistry – Metallurgy – 01 – B

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C01B 3/00 (2006.01) B01D 53/02 (2006.01)

Patent

CA 2374286

A method for introducing hydrogen into layered nanostructures. The method comprises: a) treating the layered nanostructures with an inert gas at a temperature of at least about 800°C for an effective amount of time; and b) introducing hydrogen into said nanostructures by subjecting the nanostructures to flowing hydrogen at a pressure from about 1,000 psig to about 3,000 psig. The layered nanostructures are characterized as possessing: at least some crystallinity, interstices from about 0.335 nm to 0.67 nm, and sorption properties with respect to hydrogen at those surfaces of the nanostructure which define the interstices. Preferred layered nanostructures are carbon nanostructures such as those selected from carbon nanotubes, carbon fibrils, carbon nanoshells, and carbon nanofibers. Hydrogen is chemisorbed into the interstices of the nanostructures.

L'invention concerne un procédé d'introduction d'hydrogène dans des nanostructures en couches. Ce procédé consiste (a) à traiter les nanostructures en couches avec un gaz inerte à une température d'au moins 800 DEG C environ pendant une durée efficace, et (b) à introduire de l'hydrogène dans ces nanostructures en les soumettant à un écoulement d'hydrogène à une pression variant entre 1000 psi environ et 3000 psi environ. Les nanostructures en couches se catactérisent en ce qu'elles possèdent au moins une certaine cristallinité, des interstices variant entre 0,335 nm et 0,67 nm et des propriétés de sorption par rapport à l'hydrogène au niveau des surfaces de la nanostructure définissant les interstices. Les nanostructures en couches préférées sont des nanostructures de carbone telles que celles choisies parmi les nanotubes, les fibrilles, les nanocoques et les nanofibres de carbone. L'hydrogène est chimisorbé dans les interstices des nanostructures.

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