188.8.131.52 Fuel cells
- Fuel cells are supplied by an external source of fuel (eg hydrogen) and oxygen or air. The fuel is oxidised electrochemically within the fuel cell to produce a potential difference.
The overall reaction in a hydrogen fuel cell involves the oxidation of hydrogen to produce water.
Hydrogen fuel cells offer a potential alternative to rechargeable cells and batteries.
Students should be able to:
- evaluate the use of hydrogen fuel cells in comparison with rechargeable cells and batteries
- (HT only) write the half equations for the electrode reactions in the hydrogen fuel cell.