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1. WO2013003074 - SYNTHESIS METHOD OF TRANSITION METAL NITRIDE AND TRANSITION METAL NITRIDE

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[ EN ]

WHAT IS CLAIMED IS:

A method of synthesizing a nitride of a transition metal or transition metal alloy comprising:

(a) Supplying one or more source materials containing one or more transition metals in a reactor;

(b) Supplying ammonia in the reactor;

(c) Optionally supplying a mineralizer which enhances the reaction between the source material and the ammonia;

(d) Heating the reactor to attain supercritical condition of the ammonia. A method of synthesizing a nitride of transition metal or transition metal alloy according to claim 1, wherein the mineralizer contains at least one selected from Li, Na, K, Ca, Mg and Al.

A method of synthesizing a nitride of a transition metal or transition metal alloy according to claim 1 or claim 2, wherein the reactor is made of Ni-Cr based alloy.

A method of synthesizing a nitride of a transition metal or transition metal alloy according to any of claims 1-3, wherein the reactor is heated to a temperature of 132°C or higher.

A method of synthesizing a nitride of a transition metal or transition metal alloy according to any of claims 1-4, wherein the reactor is a batch reactor which is sealed and self pressurized with heated ammonia.

A method of synthesizing a nitride of a transition metal or transition metal alloy according to any of claims 1-4, wherein the reactor is a semi -batch reactor which enables supply of the source material, the ammonia, or the mineralizer or exhaust of gas, products, or byproducts during the synthesis. A method of synthesizing a nitride of a transition metal or transition metal alloy according to any of claims 1-6, wherein the transition metal is V. A method of synthesizing a nitride of a transition metal or transition metal alloy according to any of claims 1-7, wherein the source material is metallic vanadium, vanadium oxide, vanadium pentoxide, ammonium metavanadate, or a mixture of one or more thereof.

A method according to any of claims 1-8 wherein the transition metal nitride does not incorporate a substantial amount of the mineralizer into the transition metal nitride.

Vanadium nitride particles synthesized by a method of any of claims 1-9, wherein the particle size is less than 10 nm.

Vanadium nitride particles according to claim 10 or as synthesized by a method of any of claims 1-9, wherein the specific surface area of the particles is greater than 10 m2/g.

Vanadium nitride particles of any of claims 10-11, wherein the surface of the particles is oxidized.

Vanadium nitride particles of any of claims 10-12, wherein the particles do not contain halogen impurities.

Nitride particles of transition metal or transition metal alloy synthesized by a method according to any of claims 1-9, wherein the particle size is less than 10 nm.

Nitride particles according to claim 14 or as synthesized by a method according to any of claims 1-9, wherein the specific surface area of the particles is greater than 10 m2/g.

Nitride particles of transition metal or transition metal alloy of any of claims

14-15, wherein the surface of the particles is oxidized.

Nitride particles of transition metal or transition metal alloy of any of claims

14-16, wherein the particles do not contain halogen impurities.

A compound having particles as specified in any of claims 10-17 or as made by a method of any of claims 1-9 wherein the compound comprises a nitride of a single transition metal and not a nitride of a non-transition element and a transition metal element together as one compound.