The precious metal catalyst is a precious metal material that can change the speed of chemical reaction without participating in the final product. Almost all precious metals can be used as catalysts, but platinum (CAS: 7440-06-4), palladium (CAS: 7440-05-3), ruthenium (CAS: 7440-18-8), rhodium (CAS: 7440-16-6), iridium (CAS: 7439-88-5), gold (CAS: 7440-57-5) and silver (CAS: 7440-22-4)...