Endless Facts, One Snippet at a Time
Fuel Cells Explained: Clean Energy From Chemistry
- A fuel cell makes electricity by combining hydrogen and oxygen in a chemical reaction.
- Unlike batteries, fuel cells don’t run down—they work as long as fuel is supplied.
- Hydrogen enters at the anode, releasing electrons that travel through a circuit.
- Oxygen enters at the cathode, where it joins electrons and protons to form water.
- The only byproduct of hydrogen fuel cells is clean water vapor.
- Fuel cells are highly efficient because they skip combustion and go straight to electricity.
- They power buses, cars, backup generators, and even spacecraft.
- Proton Exchange Membrane (PEM) fuel cells are common for vehicles because they operate at low temperatures.
- Solid oxide fuel cells work at high heat, ideal for industrial power generation.
- Fuel cells show how chemistry can deliver clean, renewable energy for a sustainable future.