- In this kind of cell the chemical energyof fossil fuels like coal,gas or oil is initially used to convertwater into high pressure steam and is used to run a turbine to generate
Fig. Diagrammatic representation of fuel cell
- Hydrogen and oxygenare bubbled using porous carbon electrodes into concentrated aqueoussodium hydroxide solution.
- Finely splitted platinum orpalladium metal are added to the electrodes for increasing the rateof electrode reactions.
Cathode: O2 (g) + 2H2O (l) + 4e– --> 4OH–(aq)
Anode: 2H2 (g) + 4OH–(aq) ⎯ --> 4H2O(l) + 4e–
- The net reaction is:
2H2(g) + O2(g) →2 H2O(l)