Hydrogen fuel cells (copy)
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4 Terms
1
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Reaction at the negative electrode (anode)
Oxidation
H2 (g) → 2H+(g) + 2e-
2
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Reaction at the positive electrode (cathode)
Reduction
O2 (g) + 4H+(aq) + 4e- → 2H2O(l)
3
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Overall reaction
2H2 + O2 → 2H2O
4
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Compare Hydrogen fuel cells with rechargeable batteries
Hfc does not release CO2 but electricity for rb may be generated with fossil fuels
Hfc will travel further without refueling and get refueled faster
Hfc do not get less efficient overtime but rb need to be replaced
H2 is an explosive gas and hard to store safely but no dangerous fuels in rb
Hfc producce lower pd than rb
Hfc more expensive to make and repair than rb
Note 
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