Fig. 1: Conventional and sequential models for urea electrosynthesis.
From: Sequential co-reduction of nitrate and carbon dioxide enables selective urea electrosynthesis
a Concurrent occurrence of NtrRR and CO2RR, leading to inferior production of urea and pronounced formation of side products, such as those from NtrRR. b Sequential combination of NtrRR and CO2RR, successively biasing the competition between both reactions in favour of one and resulting in high selectivity for urea synthesis. Colour codes: N, blue; O, red; C, black; H, yellow.
