Fuel Cell Concepts and Mechanisms

This video tutorial by Ms. CM explores the concept of fuel cells, which convert chemical potential energy into electrical energy. It covers three types of fuel cells: PEM, alkaline, and methanol. The PEM fuel cell uses hydrogen gas, oxidized at the anode, with electrons passing through an external circuit. The alkaline fuel cell also oxidizes hydrogen but produces water at the anode. The methanol fuel cell uses a methanol-water mixture, producing carbon dioxide and hydrogen ions. Each type of fuel cell is explained with its specific reactions and processes.

What is the primary function of a fuel cell?

• To generate heat

• To produce hydrogen gas

• To convert chemical potential energy into electrical energy

• To store electrical energy

In a hydrogen fuel cell, what is the main product formed?

• Carbon dioxide

• Methane

• Oxygen

• Pure water

What does PEM stand for in PEM fuel cells?

• Primary Energy Matrix

• Power Efficiency Mechanism

• Potential Energy Module

• Proton Exchange Membrane

In a PEM fuel cell, where does the oxidation of hydrogen occur?

• Membrane

• Anode

• Cathode

• Electrolyte

In an alkaline fuel cell, where is water produced?

• Anode

• Membrane

• Cathode

• External circuit

What ions move from the cathode to the anode in an alkaline fuel cell?

• Hydrogen ions

• Hydroxide ions

• Carbonate ions

• Oxygen ions

In a methanol fuel cell, what is the fuel composed of?

• Methanol and oxygen

• Methanol and hydrogen

• Methanol and water

• Pure methanol

What are the products of methanol oxidation in a methanol fuel cell?

• Water and oxygen

• Carbon dioxide, hydrogen ions, and electrons

• Methane and water

• Oxygen and hydrogen

In a methanol fuel cell, where do the hydrogen ions move?

• Within the electrolyte

• Outside the cell

• From anode to cathode

• From cathode to anode

What is reduced at the cathode in both PEM and methanol fuel cells?

• Methanol

• Carbon dioxide

• Hydrogen

• Oxygen