Fig. 2: Electrosynthesis of urea.
From: Selective electrosynthesis of urea from nitrate and carbon dioxide with low overpotential
a MS spectra for K14NO3 and K15NO3 with CO2 co-reduction, respectively. b FEurea and urea yield rate at different potentials in a flow cell. c LSV at 10 mV s–1 scan rate for Ag0.07/CdO catalyst in a two-electrode cell, d Faradaic efficiency of each product and e Stability test of urea synthesis during 1000 h of electrolysis at −1.6 V in a two-electrode cell. Electrochemical measurements were performed without iR compensation in a flow cell (R = 6.0 ± 0.2 Ω) and a two-electrode cell (R = 0.5 ± 0.1 Ω) at 25 °C. The electrolyte is 1.0 M KOH and 0.05 M KNO3 (pH = 14.0 ± 0.1) and the flow rate of CO2 during test was maintained at 20 mL min–1 by a gas flow meter.
