Fig. 3: Electrocatalytic performances for urea synthesis in an H-cell. | Nature Communications

Fig. 3: Electrocatalytic performances for urea synthesis in an H-cell.

From: Stable Cuδ+ sites derived from analogous rectifying interface in AgCu biphasic aerogels for efficient urea electrosynthesis at low potential

Fig. 3

(catholyte: CO2-saturated 0.5 M KHCO3 with 2000 ppm KNO3, catalyst loading: 0.5 mg cm-2, pH: 7.4 ± 0.3; temperature: 25 °C; measured resistance: 4 ± 0.5 Ω, without IR compensation) (a) Schematic diagram for an H-cell (WE, RE and CE were working electrode, reference electrode and counter electrode). b LSV curves over Ag67Cu33. Urea yield rate (from left to right, the sequence was from Ag100Cu0 to Ag0Cu100) (c) and corresponding FE (d) on AgxCu100-x at various applied potentials. e Stability tests of Ag67Cu33 at −0.52 V for 6 h. f The comparison of 1H NMR spectra of the electrolyte after the electrolysis obtained in 15N- and 14N-isotope labeling experiments. g Comparison of 1H-NMR and diacetyl monoxime test results. h Urea yield rate in different cathode electrolytes (the inset represented the actual colored solution used for UV-Vis measurement). Source data for Fig. 2 are provided as a Source Data file.

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