Cu-Bi Bimetallic Sulfides Loaded on Two-Dimensional TiCT MXene for Efficient Electrocatalytic Nitrogen Reduction under Ambient Conditions.

In this paper, TiCT MXene/Cu-Bi bimetallic sulfide (TiCT/BiCuS) composites were prepared by a simple deposition method for electrocatalytic nitrogen reduction reaction (eNRR). Compared to TiCT/BiS and TiCT/CuS, the eNRR performance of TiCT/BiCuS is significantly improved. The results show that TiCT/BiCuS exhibits a NH yield of 62.57 μg h mg in 0.1 M NaSO at -0.6 V vs reversible hydrogen electrode, and the Faradaic efficiency (FE) reaches 67.69%, which is better than that of TiCT/CuS (NH yield: 52.26 μg h mg, FE: 34.15%) and TiCT/BiS (NH yield: 54.04 μg h mg, FE: 37.38%). According to density functional theory calculations, the eNRR at the TiCT/BiCuS surface is the alternating pathway. The H NMR experiment of N proves that the N of NH generated in the experiment originates from N passed during the experiment.