Fig. 4 | Nature Communications

Fig. 4

From: Facilitating nitrogen accessibility to boron-rich covalent organic frameworks via electrochemical excitation for efficient nitrogen fixation

Fig. 4

Electroreduction of N2 to NH3 at ambient conditions. a NH3 yield rates, b corresponding Faradaic efficiencies, and c H2 selectivity of Eex-COF/NC and NC. The error bars correspond to the standard deviations of measurements over three separately prepared samples under the same conditions. d The NH3 production performance in durability test of Eex-COF/NC. e 1H nuclear magnetic resonance (NMR) spectra of the NRR products using the same isotope feeding gas for excitation and NRR. f 1H NMR spectrum of the NRR products using 14N2 for excitation and 15N2 for NRR. The red, green, blue, purple, yellow, and gray spheres represent B, C, 14N, 15N, O, and H atoms, respectively

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