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Introduction to Fuel Cells Chapter 1

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Questions and Answers

What is the main function of a fuel cell?

Storing electrical energy

Generating electrical energy from fuel via an electrochemical reaction (correct)

Converting water into hydrogen and oxygen ions

Converting electricity into heat and water

How is the process in a fuel cell different from water electrolysis?

Fuel cells conduct electrons freed from the hydrogen molecules

Fuel cells use hydrogen and oxidizer to generate electricity (correct)

Fuel cells continuously produce electricity if fuels are supplied

Fuel cells break down water into hydrogen and oxygen ions

What is the key difference between batteries and fuel cells?

Batteries contain hydrogen and oxidizer

Batteries continuously produce electricity if fuels are supplied

Fuel cells store energy

Fuel cells generate electricity continuously if fuels are supplied (correct)

When was the first commercial usage of fuel cells?

1960s Signup and view all the answers

Which component of a fuel cell serves as the negative post?

Anode Signup and view all the answers

What does the anode of a fuel cell do?

It conducts the electrons freed from hydrogen molecules Signup and view all the answers

What is the purpose of the catalyst in a fuel cell?

To facilitate the reaction of oxygen and hydrogen Signup and view all the answers

Why is carbon fiber paper commonly used for making the anode and cathode of a fuel cell?

Because it is thin, porous, hydrophobic, and conductive Signup and view all the answers

What is the function of the electrolyte in a fuel cell?

To conduct charged ions from one electrode to the other Signup and view all the answers

Why is platinum powder thinly coated onto carbon paper or cloth to make the catalyst in a fuel cell?

To increase the surface area of platinum exposed to hydrogen or oxygen Signup and view all the answers

What is a common reason for the adoption of fuel cells instead of fossil fuels?

Decreased environmental pollution and issues Signup and view all the answers

How do fuel cells work in comparison to batteries?

Fuel cells rely on chemical reactions, while batteries store energy Signup and view all the answers

What is a characteristic of carbon fiber paper used in fuel cells?

Conductivity and porosity Signup and view all the answers

Why does the electrolyte in a fuel cell need to be permeable for protons and impermeable to electrons?

To allow movement of charged hydrogen ions across the membrane Signup and view all the answers

What happens if there is no catalyst in a fuel cell?

Hydrogen and oxygen do not react to produce heat and electricity Signup and view all the answers

What is a key factor considered by fuel cell designers in minimizing costs?

Minimizing platinum usage while maintaining good cell performance Signup and view all the answers