Question

The electrode reaction that takes place at the anode of CH₄ - O₂ fuel cell is

• A. $2O_2 + \, 8H^+ \, + \, 8e^- \, \rightarrow \, 4H_2O$
• B. $CH_4 \, + \, 2H_2 O \, \rightarrow \, CO_2 \, + \, 8H^+ \, + \, 8e^- $
• C. $CH_4 \, + \, 2O_2 \, \rightarrow \, \, CO_2 \, + \, 2H_2 O$
• D. $2H^{+} \, + \, 2e^{-} \, \rightarrow \, H_2$

Answer 1

Answer: (B)

At anode the following reaction takes place $CH_4 \, + \, 2H_2 O \, \rightarrow \, CO_2 \, + \, 8H^+ \, + \, 8e^- $