Electrochemical ammonia synthesisvianitrate reduction on perovskite LaxFeO3−δwith enhanced efficiency by oxygen vacancy engineering

The oxygen vacancy-rich perovskite La 0.9 FeO 3− δ was employed as an electrocatalyst to reduce nitrate to ammonia and obtained the highest NH 3 yield of 1024.8 μg h −1 cm −2 at −1.0 V ( vs. RHE) and a faradaic efficiency of 78.1% at −0.8 V ( vs. RHE).