Nickel(III) oxide in the context of Nickel(II) nitrate

⭐ Core Definition: Nickel(III) oxide

Nickel (III) oxide is the inorganic compound with the formula Ni₂O₃. It is not well characterized, and is sometimes referred to as black nickel oxide. Traces of Ni₂O₃ on nickel surfaces have been mentioned.

Nickel (III) oxide has been studied theoretically since the early 1930s, supporting its unstable nature at standard temperatures. A nanostructured pure phase of the material was synthesized and stabilized for the first time in 2015 from the reaction of nickel(II) nitrate with sodium hypochlorite and characterized using powder X-ray diffraction and electron microscopy.

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Nickel(III) oxide in the context of Nickel(II) oxide

Nickel(II) oxide is the chemical compound with the formula NiO. It is the principal oxide of nickel. It is classified as a basic metal oxide. Several million kilograms are produced annually of varying quality, mainly as an intermediate in the production of nickel alloys. The mineralogical form of NiO, bunsenite, is very rare. Other nickel(III) oxides have been claimed, for example: Ni
₂O
₃ and NiO
₂, but remain unproven.

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