Platinum (disambiguation)
Platinum is a chemical element with symbol Pt and atomic number 78.
Platinum black
Platinum sponge is a porous, grayish-black form of platinum that can adsorb a large amount of gas, such as hydrogen or oxygen gas, allowing it to be used as a catalyst in many gas reactions such as the oxidation of ammonium. It can also be used for the ignition of combustible gases. It is used as the raw material for electronic instrument, chemical industry, and precision alloys. It can also be used as a surface active agent. It is soluble in chloroazotic acid and is formed from a mass of metallic particles.