Platinum on carbon is widely used as a catalyst in hydrogenation reactions, particularly in the pharmaceutical and fine chemical industries. It facilitates the addition of hydrogen to organic compounds, such as converting nitro groups to amines or reducing double bonds in alkenes. This catalyst is also employed in fuel cells to enhance the efficiency of electrochemical reactions. Additionally, it plays a role in the synthesis of specialty chemicals and in the purification of gases by catalyzing the removal of impurities. Its high activity and selectivity make it a valuable tool in organic synthesis and industrial processes.