Mediated Electrocatalytic Reduction of Nitrate and Nitrite Based on the Denitrifying Activity of Paracoccus denitrificans

Abstract A carbon electrode modified with immobilized cells of Paracoccus denitrificans has been found to produce catalytic currents for the reduction of nitrate and nitrite in the presence of durohydroquinone. It has been shown that durohydroquinone functions as an electron transfer mediator between the electrode and the bacterial cells to drive electrochemically the denitrifying reaction of Paracoccus denitrificans.