Vanadium Hydride Powder（VH2） 

Hydrogenated vanadium
Chinese name: Vanadium hydride
Vanadium hydride
Molecular formula: VH2
Molecular weight: 55.9812

Vanadium hydride (VH2), when the temperature rises from 25 ° C to 200 ° C, the 

pressure of hydrogen emission will rise sharply from 0.19 mpa (1.9 atmospheric 

pressure) to 87 mpa (870 atmospheric pressure), which can be said to be an ideal 

compressor. Vanadium hydride is a transition metal hydride. The elements of scandium, 

vanadium, chromium, nickel, palladium, lanthanide and actinide in transition metals can 

form binary compounds with hydrogen.
Properties of vanadium hydride:
(1)VH2 is very unstable. When the temperature is 13℃, its dissociation pressure has 

reached 1.01×105Pa. Its reaction formula is 2VH2→2VH+H2.
(2)The metal vanadium hydride is a gray metal substance, after the absorption of hydrogen, 

lattice expansion.
(3) Hydride density is about 6% ~ 10% lower than vanadium metal.
(4) Metal vanadium becomes brittle after absorption of hydrogen. Heated to 600℃ ~ 700℃ 

in vacuum, the hydride of vanadium is decomposed. With the release of hydrogen, the 

hardness of vanadium decreases and the plastic property is restored.
(5)It does not interact with water, nor with boiling hydrochloric acid, but is oxidized by nitric 

acid. Vanadium hydride is used in hydrogen storage alloy, its hydrogen storage capacity is 

large, is a promising compound.