In industrial processes, catalysts are used to enhance the efficiency of chemical reactions and reduce the formation of unwanted by-products. For example, in the Haber-Bosch process for ammonia synthesis, iron catalysts are used to increase the reaction rate and yield. Similarly, in the Contact process for sulfuric acid production, vanadium oxide catalysts help in converting sulfur dioxide to sulfur trioxide, which is further processed to produce sulfuric acid.