Hydrogen storage product and method for manufacturing same
The hydrogen storage product comprises one or more reduced-graphene oxide layers functionalized with a boron species and decorated with an alkali or alkaline earth metal. Each layer of the structure further comprises boron-oxygen functional groups comprising oxygen atoms bonded to boron atoms. The hydrogen storage product has a composition suitable for physisorption of hydrogen molecule, and operates to reversibly store hydrogen under operating conditions of low pressure and ambient temperature.
1. A hydrogen storage product comprising:
a single or multiple layered structure comprising reduced graphene oxide functionalized with boron species and decorated with alkali or alkaline earth metal, wherein each layer of the structure further comprises oxygen atoms bonded with boron to form boron-oxygen functional groups.
2. The hydrogen storage product as claimed in claim 1 wherein each layer of the structure comprises a hexagonal lattice of carbon atoms functionalized with boron atoms.
3. The hydrogen storage product as claimed in claim 2 , wherein the alkali or alkaline earth metal is located at binding positions adjacent the boron atoms, or adjacent hollows of the hexagonal lattice, or adjacent carbon-boron bonds, or adjacent the boron-oxygen functional groups.
4. The hydrogen storage product as claimed in claim 1 , wherein the alkali or alkaline earth metal is selected from a group consisting of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr and Ba.
5. The hydrogen storage product as claimed in claim 1 , wherein the structure comprises defects with pores large enough for hydrogen molecules to pass through and access adsorption sites on the structure.
6. The hydrogen storage product as claimed in claim 5 wherein the pores have an average diameter of 5 nm to 20 nm.
7. The hydrogen storage product as claimed in claim 1 wherein the structure comprises between one and ten layers.
8. The hydrogen storage product as claimed in claim 7 wherein the distance between layers is between 0.33 nm and 1.0 nm.
9. The hydrogen storage product as claimed in claim 1 comprising an atomic concentration of the boron between 1 at. % and 10 at %.
10. The hydrogen storage product as claimed in claim 1 comprising an atomic concentration of the alkali or alkaline earth metal between 1 at. % and 15 at %.
11. The hydrogen storage product as claimed in claim 3 comprising an atomic concentration of the oxygen between 1 at. % and 10 at %.