Sudovikovite

Minozzi was the first to report synthesising platinum diselenide from the elements in 1909. Platinum diselenide can be formed by heating thin foils of platinum in selenium vapour at 400 °C. A platinum 111 surface exposed to selenium vapour at 270 °C forms a monolayer of PtSe2. In addition to these selenization methods, PtSe2 can be made by precipitation in water solution of Pt(IV) treated with hydrogen selenide, or by heating platinum tetrachloride with elemental selenium.

Platinum diselenide is proposed for use as a mid-infra red detector superior to black phosphorus in durability in air. Also it can work as a catalyst, and can be built into field effect transistors. Combined with graphene it can be a photocatalyst, converting water and oxygen to reactive hydroxyl radical and superoxide. This reaction works when photons produce holes and electrons. The holes can neutralise hydroxide to make hydroxyl, and the electrons attach to oxygen to make superoxide. These reactive species can mineralise organic matter.