Question

Give an example of a fuel cell and write the anode and cathode reactions for it.

Answer 1

A common example of a fuel cell is the hydrogen-oxygen fuel cell, which is used in spacecraft and other applications where clean energy is needed.

At anode: \[\ce{[H2_{(g)} + 2OH^{-}_{ (aq)} -> 2H2O_{(l)} + 2e-]}\] × 2

At cathode: \[\ce{O2_{(g)} + 2H2O_{(l)} + 4e- -> 4OH^{-}_{ (aq)}}\]