CoCrO

CoCrO is a cobalt‑chromium oxide compound that crystallizes in a cubic spinel structure. In this arrangement both cobalt and chromium occupy octahedral and tetrahedral sites in a close‑packed array of oxide ions, resulting in a highly stable lattice that can withstand temperatures up to 1200 °C. The material is typically synthesized by reacting a mixture of cobalt nitrate and chromium nitrate with a soluble carbonate under controlled atmosphere, followed by calcination and sintering to achieve the desired phase purity. Because of its mixed‐valence state, CoCrO exhibits interesting electronic and magnetic properties; it is a promising candidate for use as a catalyst support in fuel cell technologies and in magnetic sensors where a combination of high coercivity and moderate conductivity is required.

The compound is optically opaque, usually presenting a metallic gray or black appearance. Its preparation often involves a careful balance of precursor stoichiometry to avoid secondary phases such as CoO or Cr₂O₃. In industrial applications, CoCrO can be blended with other oxides to form composite ceramic coatings that resist wear, corrosion and oxidation. While research into its photocatalytic activity is ongoing, the material’s primary uses remain in high‑temperature structural components and in devices that exploit its magnetic response. Overall, CoCrO is a robust, multifunctional oxide that bridges the fields of materials science and energy conversion.