Surface oxidized two-dimensional antimonene nanosheets for electrochemical ammonia synthesis under ambient conditions

Two-dimensional (2D) antimonene nanosheets are prepared using a combination of ball milling and sonication-based liquid exfoliation and are used as an efficient electrocatalyst for the nitrogen reduction reaction (NRR). In 0.1 M KOH, a high NH 3 yield of 180.4 μg h −1 mg CAT −1 and faradaic efficiency (FE) of 11.6% are achieved using our antimonene nanosheets. Theoretical calculations suggest that the oxidized species of antimonene act as the active catalytic sites for the NRR process. This work opens up a new avenue towards the development of 2D electrocatalysts for clean energy. Few-layer antimonene nanosheets with surface oxidation have been used as an efficient nitrogen reduction reaction electrocatalyst for ammonia synthesis.