The main components of palladium black are palladium, carbon, and oxygen. Its preparation method is complex, and it needs to be prepared by high temperature reduction. The color of palladium black is mainly derived from the nanostructures on its surface, which absorb large amount of light and thus appear black. Unlike palladium oxide, palladium black has good electrical and thermal conductivity. Therefore, it has a wide range of applications in the field of electronic components and thermal management. In addition, palladium black also has excellent catalytic properties and has a wide range of applications in the field of catalysts.