Fig. 2: Evaluation of electrocatalytic performance and qualitative detection of products.

a, b Faradaic efficiencies of major reduction products on Ru1Cu SAA for a CORR and b NO2−RR. c 1H NMR spectra of standard references (HCONH2 and H13CO15NH2) and the electrolyte obtained after CORR, NO2−RR, and NO2− + CO/15NO2− + 13CO co-reduction. d GC-MS results of the electrolyte obtained after NO2− + CO and 15NO2− + 13CO co-reduction. e Products distribution at different applied potentials in a CO-saturated 1 M KOH + 1 M KNO2 solution on Ru1Cu SAA. f Highest formamide Faradaic efficiencies and Yield of Cu NCs, Ru1Cu SAA, and RuCu NPs. The error bars represent the standard deviation for at least three independent measurements.