Fig. 4: Electroreduction of N2 to NH3 under ambient conditions.
From: Salting-out effect promoting highly efficient ambient ammonia synthesis
a Ultraviolet-visible absorption spectra of the electrolytes under different conditions. No apparent NH3 was detected for the control experiments with Ar-saturated electrolyte under Echem, N2-saturated electrolyte under open circuit potential (OCP), or bare working electrode (WE) without single-atom boron-decorated carbon catalyst (SAB/C) in N2-saturated electrolyte under Echem. b NH3 yield rates, c corresponding Faradaic efficiencies, and d HER yield rates in different systems. e Comparison of the Faradaic efficiency and NH3 yield rate using different feeding gases for NRR at −0.3 V vs. RHE either by indophenol or nuclear magnetic resonance (NMR) method. The error bars correspond to the standard deviations of measurements of three separately prepared samples under the same conditions. f Comparison of our results with state-of-the-art noble-metal-free electrocatalysts in terms of yield and Faradaic efficiency (FE); detailed data are provided in Supplementary Table 4. The Faradaic efficiency of our work is very close to the target set by the U.S. Department of Energy (DOE)’s ARPA-E REFUEL Program.
