High-efficiency electrosynthesis of ammonia with selective reduction of nitrite over an Ag nanoparticle-decorated TiO2 nanoribbon array

An Ag nanoparticle-decorated TiO 2 nanoribbon array on a titanium plate performs efficiently in electrocatalytic NO 2 − reduction to NH 3 , achieving a large NH 3 yield of 8743.1 μg h −1 cm −2 with a high faradaic efficiency of 96.4%.