PGM (Platinum group metal) chemicals consist of palladium (Pd), Osmium (Os), Platinum (Pt), Rhodium (Rh), Ruthenium (Ru), and Iridium (Ir), which, together with Gold and Silver are known as precious metal due to their unique utility and rarity. PGM metals have high melting points, remarkable strength, and are resistant to oxidation and corrosion. PGM catalysts are used in many fields, such as petrochemical industry, medicine, pesticide, environmental preservation, food industry and energy.