MoS₂ Nanodots Anchored on Reduced Graphene Oxide for Efficient N₂ Fixation to NH₃

Electrochemical N₂ reduction to NH₃ has been considered as a promising sustainable and clean process to replace the conventional Haber-Bosch process. However, the development of efficient and stable electrocatalysts with superior activity for the electrochemical N₂ reduction reaction (NRR) remains a great challenge. In this work, a composite of MoS₂ nanodots highly dispersed on reduced graphene oxide (MoS₂ NDs/RGO) is prepared as an effective catalyst for electrochemical N₂ fixation. Benefiting from the homogeneous dispersion of the MoS₂ NDs on RGO and the strong C-S-C bridging bonds between them, this composite can provide abundant active sites and boost the electron transfer in the reaction. As a result, the MoS₂ NDs/RGO hybrid achieves a remarkable faradaic efficiency of 27.93% and NH₃ yield rate of 16.41 μg h^-1 mg_cat. ^-1 at ambient conditions, which is much better than the NRR performance achieved by MoS₂ nanosheets on reduced graphene oxide (MoS₂ NS/RGO). Additionally, the catalyst shows high electrochemical selectivity and stability.