# Can we make a rusting battery

Since in rusting (oxidation) of Iron, transfer of 4 electrons takes place is it possible to use this reaction under catalytic conditions to create a simple electric cell, even if it just gave a millivolt of potential.

$\ce {Fe + H2O -> FeOH3 + H2}$

Considering that we have complete control over the surroundings, like volume expansion, disposing hydrogen and other such factors.

• Yeah in theory is possible, but the efficiency would be se low that it will be practicaly useless :x – Babounet Jan 13 '15 at 16:04
• @Babounet, I know the efficiency is less but I require it to perform a very small task, that's why. and if we catalyse the reaction it can give good results. – yawar Jan 14 '15 at 14:58