Q. Consider the following statements regarding the Proton Exchange Membrane (PEM) fuel cells:
1.Proton Exchange Membrane (PEM) fuel cells convert hydrogen and oxygen into electricity and water.
2.They operate under a very high temperature.
3.They use a solid polymer electrolyte membrane that conducts protons from the cathode to the anode.
How many of the above statements are correct?
Answer: A
Notes:
Explanation: 1 only
Statement 1 is correct: Proton Exchange Membrane (PEM) fuel cells convert hydrogen and oxygen into electricity and water.
Statement 2 is incorrect: Operating at relatively low temperatures (\(60\text{–}80^\circ\text{C}\)), they offer high power density and efficiency.
Statement 3 is incorrect: PEM fuel cells use a solid polymer (proton-conducting) electrolyte membrane. Hydrogen supplied at the anode is split into protons and electrons; the membrane allows only the protons to pass to the cathode, while the electrons flow through an external circuit to generate electricity.
Source: TH
