Vanadium Hydride Powder, VH2
Chinese name: 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,
(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.