CuCuO2N

CuCuO₂N is a mixed-valence copper oxynitride ceramic compound containing both Cu(I) and Cu(II) oxidation states, representing an emerging class of functional ceramics that combine copper metallurgy with nitrogen incorporation. This material family is primarily explored in research contexts for applications requiring electrical conductivity, catalytic activity, or optical properties that exceed those of conventional copper oxides. The nitrogen doping creates defect chemistry and electronic structure modifications that make copper oxynitrides candidates for energy storage, photocatalysis, and electronic device applications where copper's tunability is an advantage over traditional all-oxide ceramics.