Fig. 4: Electrocatalytic measurements for urea electrosynthesis.
From: Carbon dioxide and nitrate co-electroreduction to urea on CuOxZnOy

a Faradaic efficiency between −0.6 and −0.9 V vs RHE in 0.1 M Na2SO4 and 0.1 M NaNO3 with CO2, (b) Partial current density to urea between −0.6 and −0.9 V vs RHE in 0.1 M Na2SO4 and 0.1 M NaNO3 with CO2. The error bars display the average error obtained between three measurements.