Fig. 4: Electrocatalytic NO3RR performance of 4H/fcc Au–Cu BBNs.
a LSV curves of 4H/fcc Au–Cu BBNs-h, 4H/fcc Au NWs, and fcc Cu NPs with RDE at 1600 rpm. Faradaic efficiency (b) and yield rate (c) of NH3 obtained on 4H/fcc Au–Cu BBNs-h, 4H/fcc Au NWs, and fcc Cu NPs. d ECSA comparison between 4H/fcc Au–Cu BBNs-h, 4H/fcc Au NWs, and fcc Cu NPs. e Comparison of NO2− Faradaic efficiency between 4H/fcc Au NWs and fcc Cu NPs. f The effect of Cu domain density in 4H/fcc Au–Cu heteronanostructures on NO3RR performance. g Schematic illustration of the NO3RR measurements of 4H/fcc Au–Cu BBNs in flow cell, where the fast electrolyte flowing ensures the abundant NO3− supply and helps to refresh the electrode surface. h, Flow cell performance of 4H/fcc Au–Cu BBNs-h: the partial current and Faradaic efficiency of NH3 obtained in the electrolyte containing 1 M KOH and 1 M KNO3 under different potentials. Where error bars are shown, values are means, and error bars indicate s.d. (n = 3 replicates). Source data are provided as a Source data file.
