Oxidation catalysts are substances that speed up chemical reactions involving the addition of oxygen or the removal of hydrogen. They are commonly used in various industrial processes, including the production of chemicals and the purification of exhaust gases from vehicles. By lowering the energy required for these reactions, oxidation catalysts improve efficiency and reduce harmful emissions. One well-known example of an oxidation catalyst is platinum, which is often used in catalytic converters to convert toxic gases like carbon monoxide and hydrocarbons into less harmful substances. Other materials, such as palladium and rhodium, are also used in these applications, enhancing the effectiveness of the catalytic process.