Fig. 4: In-situ characterization and inference of intermediate species. | Nature Communications

Fig. 4: In-situ characterization and inference of intermediate species.

From: Efficient urea electrosynthesis from carbon dioxide and nitrate via alternating Cu–W bimetallic C–N coupling sites

Fig. 4: In-situ characterization and inference of intermediate species.

a In situ Raman spectra of CuWO4 in 0.1 M KNO3 with CO2 bubbling at different applied potentials or Ar bubbling at open circuit state. b NO2-temperature programmed gas desorption (TPD) of CuWO4, CuO, and WO3. c Online DEMS of CuWO4 in 0.1 M KNO3 with saturated CO2 at −0.2 V vs. RHE. d Online DEMS of CuWO4 in 0.1 M K15NO3 with saturated 13CO2 at −0.2 V vs. RHE. e Control experiment results of different carbon and nitrogen sources for speculating the urea synthesis mechanism.

Back to article page