Electrochemical CO2 reduction reaction (CO2RR) have been thoroughly investigated in the literature. Cu is the only catalyst to produce C2 products like C2H4. Ag 14 , Au , and Zn 16 are prominent catalysts to produce CO. Electrochemical NO3 -reduction to NH3 (NRN) has been investigated on a wide variety of catalysts including Cu 17 , Pd 18 , Fe 19 , Ti 11 , and Co 20, 21 etc. and among them Co is the best catalyst for the electrochemical synthesis of NH3 from NO3 -in alkaline medium. Early works of Shibata et al. report the electrochemical reduction of NO2 -/NO3 - and CO2 on a wide variety of transition metal based gas diffusion electrodes. Zn exhibited the highest urea current efficiency of 35 % at -1.75 V vs. SHE from the electrochemical reduction of NO3 -and CO2. They proposed from experimental evidence that NH3-like precursor formed from NO2 -and CO-like precursor is essential for urea synthesis. Feng et al. reports a 12.2 % urea Faradaic efficiency (FE) at -1.1 V vs. RHE from the electrochemical reduction of NO2 -and CO2 on Te-doped Pd nanocrystal. Leverett et al. used a single-atom Cu catalyst for the electrochemical reduction of NO3 -and CO2 to urea with 28 % urea FE at -0.9 V vs. RHE. Meng et al. synthesized ZnO porous nanosheets for electrosynthesis of urea from NO2 -and CO2 with a urea FE of 23.26 % at -0.79 V vs. RHE. Lv et al. report a very high urea FE of 53.4 % from the electrochemical reduction of NO3 -and CO2 on In(OH)3 based catalyst. A detailed summary of the urea FE and current density obtained on prominent catalysts reported in the literature is given in the supporting information (Table ). A thorough catalyst screening to selectively synthesize urea is not available in the existing literature.