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Questions and Answers
A hydrogen fuel cell uses hydrogen and oxygen as its primary reactants.
A hydrogen fuel cell uses hydrogen and oxygen as its primary reactants.
True (A)
The cathode in a hydrogen fuel cell receives hydrogen fuel.
The cathode in a hydrogen fuel cell receives hydrogen fuel.
False (B)
A Proton Exchange Membrane (PEM) allows both protons and electrons to pass through it.
A Proton Exchange Membrane (PEM) allows both protons and electrons to pass through it.
False (B)
Oxidation occurs at the cathode of a hydrogen fuel cell.
Oxidation occurs at the cathode of a hydrogen fuel cell.
The byproduct of a hydrogen fuel cell is carbon dioxide.
The byproduct of a hydrogen fuel cell is carbon dioxide.
Flashcards
What happens at the anode in a hydrogen fuel cell?
What happens at the anode in a hydrogen fuel cell?
The location where oxidation occurs, splitting hydrogen molecules into protons and electrons.
What happens at the cathode in a hydrogen fuel cell?
What happens at the cathode in a hydrogen fuel cell?
The location where reduction occurs, combining oxygen, electrons, and protons to form water.
What is the role of the Proton Exchange Membrane (PEM)?
What is the role of the Proton Exchange Membrane (PEM)?
A membrane that selectively allows protons ($H^{+}$ ions) to pass through, but not electrons.
What is the oxidation reaction in a hydrogen fuel cell?
What is the oxidation reaction in a hydrogen fuel cell?
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What is the reduction reaction in a hydrogen fuel cell?
What is the reduction reaction in a hydrogen fuel cell?
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Study Notes
Hydrogen Fuel Cell - Simple Overview
- Begins with a supply of hydrogen and oxygen (H2 and O2).
Fuel Cell Components
- The cathode receives O2.
- A porous material is present.
- PEM (Proton Exchange Membrane) only allows H+ ions (protons) to pass through.
Electrochemical Reaction
- Total reaction: 2H2(g) + O2(g) -> 2H2O(ag)
- Involves an electrical current (4e-) that flows through an external load.
- Water is the byproduct.
Oxidation at the Anode
- Hydrogen (2H2) is converted into protons (4H+) and electrons (4e-), which is Oxidation
Reduction at the Cathode
- Oxygen (O2) combines with electrons (4e-) and protons (4H+) to form water (2H2O), this is Reduction
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Description
Explore the basics of hydrogen fuel cells, including components like the cathode, PEM, and the electrochemical reactions that produce electricity and water. Learn about oxidation and reduction processes at the anode and cathode, and the role of hydrogen and oxygen.
