Direct eight-electron NO3−-to-NH3 conversion: using a Co-doped TiO2 nanoribbon array as a high-efficiency electrocatalyst

A Co-TiO 2 nanoribbon array supported on a Ti plate is a high-efficiency catalyst for electrochemical NO 3 – -to-NH 3 conversion, capable of attaining a large NH 3 yield of 1127 μmol h −1 cm −2 and high Faradaic efficiency of 98.2%.