Fig. 5: Analysis of the NO3RR electrolysis and practical ammonia product synthesis. | Nature Communications

Fig. 5: Analysis of the NO3RR electrolysis and practical ammonia product synthesis.

From: Multivariate covalent organic frameworks with tailored electrostatic potential promote nitrate electroreduction to ammonia in acid

Fig. 5

Operando Raman spectra of (a) BECOF/PdCu and (b) PdCu collected at −1.3 V versus RHE as a function of time. Operando FTIR spectra of (c) BECOF/PdCu and (d) PdCu collected at −1.3 V versus RHE as a function of time. e 1H NMR spectra of standard samples and the NO3RR products using 14NO3– and 15NO3– as the isotopic nitrate source in 0.05 M H2SO4 electrolyte. f Comparison of the calculated NH3 yield rates and Faradaic efficiencies at −1.3 V versus RHE using different quantification methods. The potential was not iR-corrected. g Schematic of the ammonia product synthesis process from nitrate-containing influent to NH4Cl(s). h XRD analysis results of generated and commercial NH4Cl solid products.

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