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\( \mathrm{OH^-} \) ions react with \( \mathrm{N_2H_4} \) at the anode to form \( \mathrm{N_2(g)} \) and water, releasing 4 electrons to the anode

At the cathode, \( \mathrm{N_2H_4} \) breaks to \( \mathrm{N_2(g)} \) and nascent hydrogen released at the electrode reacts with oxygen to form water

At the cathode, molecular oxygen gets converted to \( \mathrm{OH^-} \)

Oxides of nitrogen are major by-products of the electrochemical process