Co–NCNT nanohybrid as a highly active catalyst for the electroreduction of nitrate to ammonia

A Co–nitrogen-doped carbon nanotube nanohybrid exhibits efficient performance for the electroreduction of NO 3 − to NH 3 under ambient conditions, attaining a high faradaic efficiency of 92% with a large NH 3 yield of 5996 μg h −1 cm −2 .