Fuel cells Flashcards
1
Q
What are hydrogen fuel cells
A
Cells that produce electricity for as long as you provide hydrogen
2
Q
Disadvantages of hydrogen fuel cells
A
They run on hydrogen which is explosive and difficult to store
3
Q
What happens to the fuel in an hydrogen fuel cell?
A
It is oxidised electrochemically to produce a potential difference
4
Q
What is the half equation at the positive electrode of a hydrogen fuel cell where oxygen reacts with the hydrogen ions to make water
A
02 + 4H+ +4e- –> 2H2O
5
Q
What is the half equation at the negative electrode of a hydrogen fuel cell where hydrogen forms hydrogen ions?
A
2H2 — > 4H+ + 2e-
6
Q
What is the overall equation of a hydrogen fuel cell?
A
hydrogen + oxygen –> water
7
Q
What is oxidised in a hydrogen fuel cell?
A
hydrogen
