Nickel(III) oxide

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 429043362

| Name = Nickel (III) oxide

| ImageFile1 = Nickel (III) oxide powder.jpg

| ImageName1 = Nickel (III) oxide powder

| IUPACName = Nickel (III) oxide

| OtherNames = Nickel sesquioxide,
nickel trioxide

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 1314-06-3

| ChemSpiderID = 8488737

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = 07BD7540U5

| PubChem = 10313272

| EINECS = 215-217-8

| RTECS = QR8420000

| StdInChI=1S/2Ni.3O/q2*+3;3*-2

| StdInChIKey = GNMQOUGYKPVJRR-UHFFFAOYSA-N

| SMILES = [O-2].[O-2].[O-2].[Ni+3].[Ni+3]

}}

|Section2={{Chembox Properties

| Formula = Ni₂O₃

| MolarMass = 165.39 g/mol

| Appearance = black-dark gray solid

| Density = 4.84 g/cm³

| Solubility = negligible

| MeltingPtC = 600

| MeltingPt_notes = (decomposes)

| BoilingPt =

}}

|Section7={{Chembox Hazards

| ExternalSDS =

| MainHazards =

| NFPA-H = 2

| NFPA-F = 0

| NFPA-R = 0

| FlashPt =

}}

}}

Nickel (III) oxide is the inorganic compound with the formula Ni₂O₃. It is not well characterized,{{Greenwood&Earnshaw}} and is sometimes referred to as black nickel oxide. Traces of Ni₂O₃ on nickel surfaces have been mentioned.{{Cite journal|last1=Aggarwal|first1=P. S.|last2=Goswami|first2=A.|date=1961|title=An oxide of tervalent nickel|journal=The Journal of Physical Chemistry|language=en|volume=65|issue=11|pages=2105|doi=10.1021/j100828a503|issn=0022-3654}}{{Cite journal|last1=Kang|first1=Jin-Kyu|last2=Rhee|first2=Shi-Woo|date=2001|title=Chemical vapor deposition of nickel oxide films from Ni(C₅H₅)₂/O₂|journal=Thin Solid Films|language=en|volume=391|issue=1|pages=57–61|doi=10.1016/S0040-6090(01)00962-2|bibcode=2001TSF...391...57K}}

Nickel (III) oxide has been studied theoretically since the early 1930s,{{Cite journal |last1=Cairns |first1=R. W. |last2=Ott |first2=Emil |date=February 1933 |title=X-Ray Studies of the System Nickel—Oxygen—Water. I. Nickelous Oxide and Hydroxide 1 |url=https://pubs.acs.org/doi/abs/10.1021/ja01329a013 |journal=Journal of the American Chemical Society |language=en |volume=55 |issue=2 |pages=527–533 |doi=10.1021/ja01329a013 |bibcode=1933JAChS..55..527C |issn=0002-7863}} 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.{{Cite journal |last1=Dey |first1=Sayan |last2=Bhattacharjee |first2=Swarupananda |last3=Chaudhuri |first3=Mahua Ghosh |last4=Bose |first4=Raj Shekhar |last5=Halder |first5=Suman |last6=Ghosh |first6=Chandan Kr |date=2015-06-18 |title=Synthesis of pure nickel(III) oxide nanoparticles at room temperature for Cr(VI) ion removal |url=https://pubs.rsc.org/en/content/articlelanding/2015/ra/c5ra05810d |journal=RSC Advances |language=en |volume=5 |issue=67 |pages=54717–54726 |doi=10.1039/C5RA05810D |bibcode=2015RSCAd...554717D |issn=2046-2069}}