Extended Data Fig. 4: Further confirmation of methylamine formation and its C, N sources.
From: Direct electrosynthesis of methylamine from carbon dioxide and nitrate
a, Standard mass spectrum of N-methylpivalamide from NIST Mass Spectral Library. b, 1H NMR spectrum of methylamine after electrolysis in 0.1 M PBS + 0.5 M KNO3 under 13CO2 for 30 min at −0.95 V vs RHE. c, 1H NMR spectrum of formaldoxime, N-methylhydroxylamine and methylamine after electrolysis in 0.1 M KHCO3 + 0.5 M K15NO3 under CO2 for 5 h at −0.91 V vs RHE. The green traces show the 1H NMR spectra of formaldoxime, N-methylhydroxylamine and methylamine from co-reduction of unlabeled CO2 and NO3−.
