Nickel nitrate is the inorganic compound Ni(NO3)2 or any hydrate thereof.

Rather it is generated by the reaction of hydrates with dinitrogen pentoxide or of nickel carbonyl with dinitrogen tetroxide:[3] The hydrated nitrate is often used as a precursor to supported nickel catalysts.

[3] Nickel(II) compounds with oxygenated ligands often feature octahedral coordination geometry.

In heterogeneous catalysis, nickel(II) nitrate is used to impregnate alumina.

[6] In homogeneous catalysis, the hexahydrate is a precatalyst for cross coupling reactions.