Extended Data Fig. 10: Condensation between formaldehyde and hydroxylamine to form formaldoxime.
From: Direct electrosynthesis of methylamine from carbon dioxide and nitrate
a, 1H NMR spectra of 25 mM HCHO dissolved in electrolyte solution before and after adding 50 mM NH2OH. Peaks pertaining to formaldoxime are highlighted in purple. b, 1H NMR spectrum of the catholyte solution after co-reduction mixed with 1 M NaHSO3. Stacked together are spectra of HCHO and formaldoxime mixed with 1 M NaHSO3. Only the reaction product between formaldoxime and NaHSO3 (~4.00 ppm) but no reaction product between HCHO and NaHSO3 (~4.39 ppm) can be found.
