Ĭobalt(II,III) oxide is used as an electrode in some lithium-ion batteries, possibly in the form of cobalt oxide nanoparticles.Ĭobalt compounds are potentially poisonous in large amounts. In this work, ultrafine cobalt oxide (CoO x) co-catalysts with specific Co valence states have been successfully synthesized, which are anchored on a tantalum oxynitride (TaON) host photocatalyst via a photochemical metalorganic deposition method. These reaction are described by the following equilibrium:Ģ Co 3O 4 ⇌ 6 CoO + O 2 Applications Ĭobalt(II,III) oxide is used as a blue coloring agent for pottery enamel and glass, as an alternative to cobalt(II) oxide. Co O Co O O, and Co O ), (ii) cobalt oxide-rich catalysts obtained by controlled non-isothermal H -reduction of Co O to various temperatures (400700 C), and (iii) cobalt metal-rich catalysts obtained by controlled isothermal H -reduction of Co O at 700 C of Co O for various time durations (31125 min). Tetrahedral coordination geometry of Co(II)ĭistorted octahedral coordination geometry of Co(III)ĭistorted tetrahedral coordination geometry of OĬobalt(II) oxide, CoO, converts to Co 3O 4 upon heating at around 600–700 ☌ in air. Cobalt oxides comprise two readily accessible cation oxidation states: Co2+ and Co3+, which are thermodynamically competitive under common ambient. Shereen Saju National Institute of Technology Tiruchirappalli How to dissolve CoO (Cobalt Oxide) I synthesized SmCo5 (Samarium Cobalt) samples in which I found many impurities of Cobalt. Structure Ĭo 3O 4 adopts the normal spinel structure, with Co 2+ ions in tetrahedral interstices and Co 3+ ions in the octahedral interstices of the cubic close-packed lattice of oxide anions. As a mixed valence compound, its formula is sometimes written as Co IICo III 2O 4 and sometimes as CoO It is one of two well characterized cobalt oxides. It is well known that the synthesis conditions have a great impact on the properties of the nanomaterial. Introduction The development of inorganic materials with special morphologies in the nanometer regime is of significant interest in material science and industry. It can be used as a negative electrode material for lithium-ion batteries and is. ![]() Cobalt(II,III) oxide is an inorganic compound with the formula Co 3O 4. Cobalt hydroxide oxide XRPD XPS NEXAFS SQUID 1. Cobalt (II) Oxide (CoO) Powder (CAS: ) is a kind of black powder.
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