Cobalt oxide

Cobalt oxide may refer to: Cobalt oxide may refer to: Co3O4 can be obtained by several methods including combustion solution. When redox reactions are involved in the synthesis processes (such as combustion), it must be taking into account the possible formation of tiny cobalt nanoparticles as a byproduct. Co3O4 is an antiferromagnetic oxide but it can be prepared in composites with a ferromagnetic material such CoFe2O4 and NiFe2O4 to manipulate and separate it inside the liquids. Co3O4 is an excellent catalyst for the production of hydrogen by decomposition of the sodium borohydride (NaBH4). The catalytic activity is due to the mixed-valence (i.e. 2+ and 3+) of the cobalt cations. In fact, Possible mechanisms for the degradation of organic pollutants such as 4-nitrophenol has been proposed.