This Demonstration shows a simple model of a hydrogen fuel cell. Hydrogen molecules flow from the blue tank through the catalyst where electrons are removed, and proceed toward the cathode. The electrons form a current through the external wire, ending up in the cathode and recombining with the hydrogen ions to regenerate hydrogen gas. Oxygen gas flows from the red tank and hydrogen peroxide is produced in the reaction with hydrogen gas. This in turn dissociates into water plus another hydrogen molecule. The water then passes through the external exhaust pipe as "waste".
The blue tank on the left contains the hydrogen gas that runs into the anode. The catalyst then splits off electrons from the hydrogen atoms, enabling the electrons to go through the wire, forming a current, while the hydrogen ions migrate through the polymer electrolyte membrane.
On the right, there is an oxygen tank; oxygen flows into the cathode from the tank. In the cathode, the hydrogen ions recombine with the electrons to form hydrogen gas. Then the oxygen gas and hydrogen gas first form hydrogen peroxide, which dissociates into water plus another hydrogen molecule. the process is summarized by the equations
Water then flows out of the system through the exhaust pipe, a more environmentally-friendly waste product than carbon dioxide or pollutants from other conventional fuel cells.
This Demonstration needs a lot of computing power; after some time, the Demonstration will begin to lag as the number of particles increases. Additionally, the slowdown may cause the particles to appear outside the system, especially if the membrane size is at a minimum and the speed factor is at a maximum.