Fuel cells Flashcards
(7 cards)
1
Q
in a fuel cell, we react a fuel (such as hydrogen) with…
A
pure oxygen or air
2
Q
in a hydrogen fuel cell, the only waste product is
A
water
3
Q
what happens at the cathode
A
the hydrogen splits into a hydrogen ion and electrons
4
Q
whats the equation for the cathode
A
2H2 → 4H+ + 4e-
5
Q
what happens at the anode
A
oxygen molecules combine with the hydrogen ions and electrons produced at the negative electron
6
Q
whats the equation for the anode
A
O2 + 4H- + 4e- → 2H2O
7
Q
positives and negatives for hydrogen fuel cells
A
- hydrogen fuel cells will produce electricity for as long as you produce hydrogen
- they do not get less efficient as they run
- however they require lots of hydrogen which is a safety hazard
