Question
How does a fuel cell operate?
Solution
Answer:
Oxidation/combustion takes place at anode with the liberation of energy.
Galvanic cells that are designed to convert
the energy of combustion of fuels like hydrogen, methane, methanol, etc. directly into electrical energy are called fuel cells
Oxidation/combustion takes place at anode with the liberation of energy.
The electrode
reactions are given below:
Cathode: O2(g) + 2H2O(l) + 4e- -->4OH-(aq)
Anode: 2H2 (g) + 4OH-(aq) ---> 4H2O(l) + 4e-
Overall reaction being:
2H2(g) + O2(g) ---> 2 H2O(l )
