Fig. 1: The schematic diagram of analogous rectifying interface effect leading to high urea synthesis performance.

a The formation of stable Cuδ+ sites through the analogous rectifying interface effect in AgCu biphasic aerogels. b The electron-deficient Cuδ+ enhances the affinity adsorption of *NOH, facilitating successful coupling to urea, while the ineffective adsorption of *NHO on conventional Cu0 prevents further coupling.