Greatly enhanced electrochemical nitrate-to-ammonia conversion over an Fe-doped TiO2nanoribbon array

An Fe–TiO 2 nanoribbon array supported on a Ti plate is a high-efficiency catalyst for electrocatalytic NO 3 − -to-NH 3 conversion, capable of achieving a large NH 3 yield of up to 940.17 μmol h −1 cm −2 and a high faradaic efficiency of 95.93%.