Different metallic catalysts are screened for the electrochemical synthesis of urea from NO3 -and CO2. The Electrochemical reaction is performed in a custom-made flow cell where the solution of 0.1 M KNO3 and 0.1 M KHCO3 equilibrated with CO2 is used as the catholyte. Chronoamperometry is performed by applying a constant potential of -1 V vs. RHE for a period of 1h. A detailed experimental procedure is given in the methods section. In total, 17 different catalysts are chosen for the study including the prominent electrochemical CO2 reduction catalysts 31 such as Cu, Zn, Ag, Au, Sn, In, Re, and Pb, and catalysts active for electrochemical NO3 -reduction 32 to NH3 such as Co, Ni, Fe, and Pd. The catholyte is tested for urea and NH3 post-electrolysis using colorimetric methods. A detailed procedure on the quantification methods for urea and NH3 is provided in the methods section. The catalyst that exhibits the highest urea Faradaic Efficiency (FE) and the highest urea current density (CD) is preferred.