Catalysts allow chemical reactions to occur at lower temperature, and are therefore used in the chemical industry to make manufacturing processes more economical. give some examples of catalysts used in industry

Iron: used to make ammonia by the haber process platinum: used in the manufacture of nitric acid in the ostwald porocess rhodium and platinum: in catalytic converters nickl: to make margarine by hardening vegetable oil vanadium (v) oxide: in the contact process, to make sulphuric acid