In H 2- O 2 fuel cell the reaction occuring at cathode is-A- 2 H 2 O - O 2-4 e - 4 OH -B- 2 H 2- O 2- 2 H 2 O l C- H - OH - H 2 OD - H - e -1-2 H 2

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Fuel Cells

In H 2- O 2 f...

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In $H_{2} - O_{2}$ fuel cell the reaction occuring at cathode is:

2 H_{2} O + O_{2} + 4 e^{-} \to 4 O H^{-}

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2 H_{2} + O_{2} \to 2 H_{2} O (l)

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H^{+} + O H^{-} \to H_{2} O

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H^{+} + e^{-} \to \frac{1}{2} H_{2}

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In H₂ - O₂ fuel cell the reaction occuring at cathode is :

In $H_{2} - O_{2}$ fuel cell the reaction occuring at cathode is:

A fuel cell is:

I.A voltaic cell in which continuous supply of fuels are sent at anode to perform oxidation.

II. A voltaic cell in which fuels such as :

$C H_{4}, H_{2}$ and CO are used up at anode.

III. One which involves the reaction of $H_{2} O_{2}$ fuel cell such as:

Anode : $2 H_{2} + 4 ⊖ O H \to 4 H_{2} O (l) + 4 e^{-}$

Cathode : $O_{2} + 2 H_{2} O (l) + 4 e^{-} \to 4 ⊖ O H$

IV. The efficiency of $H_{2} - O_{2}$ fuel cell is $70$ to $75 %$ .

H_{2} - O_{2}

{2 H}_{2} O + {2 e}^{-} \to H_{2} + 2 {O H}^{-}

{x O H}^{-} \to O_{2} + {2 H}_{2} O + {y e}^{-}

{2 H}_{2} O \to 2 H_{2} + O_{2}

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