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A reduction reaction will occur when a suitable potential is applied to the electrode: ox + ne- → red
Where ox is the oxidized species, red is reduced species, n is the number of electrons transferred and e- is an electron.
A concentration gradient of ox caused by its depletion at the electrode surface leads to mass transport by diffusion. This leads to a flux of ox, Jox (mol/m2s) that related to the reduction current, ired, through the electrode with an area A according to Faraday’s law:
ired = - nFAJox ↔ Jox = - ired / nFA
Where:
ired = reducing current (A)
Jox = flux of dissolved oxygen
The electrical current is proportional to the amount of DO transported by the electrode.
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