16 Questions
What is the main function of a fuel cell?
Generating electrical energy from fuel via an electrochemical reaction
How is the process in a fuel cell different from water electrolysis?
Fuel cells use hydrogen and oxidizer to generate electricity
What is the key difference between batteries and fuel cells?
Fuel cells generate electricity continuously if fuels are supplied
When was the first commercial usage of fuel cells?
1960s
Which component of a fuel cell serves as the negative post?
Anode
What does the anode of a fuel cell do?
It conducts the electrons freed from hydrogen molecules
What is the purpose of the catalyst in a fuel cell?
To facilitate the reaction of oxygen and hydrogen
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
What is the function of the electrolyte in a fuel cell?
To conduct charged ions from one electrode to the other
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
What is a common reason for the adoption of fuel cells instead of fossil fuels?
Decreased environmental pollution and issues
How do fuel cells work in comparison to batteries?
Fuel cells rely on chemical reactions, while batteries store energy
What is a characteristic of carbon fiber paper used in fuel cells?
Conductivity and porosity
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
What happens if there is no catalyst in a fuel cell?
Hydrogen and oxygen do not react to produce heat and electricity
What is a key factor considered by fuel cell designers in minimizing costs?
Minimizing platinum usage while maintaining good cell performance
This quiz covers the basic concepts of fuel cells, which are electrochemical devices that generate electrical energy from fuel through a chemical reaction. It discusses the process of fuel cells in comparison to water electrolysis and their output of electricity, heat, and water.
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