Phosphorus-doped Ti 3 C 2 T x MXene nanosheets enabling ambient NH 3 synthesis with high current densities.

Herein, we show that P-doped Ti 3 C 2 T x MXene nanosheets can effectively catalyze the NO 3 RR-to-NH 3 conversion with a high faradaic efficiency of 95% and a yield rate of 5.39 mg h -1 mg cat. -1 . Moreover, the catalyst achieves an impressive high current density of -1200 mA cm -2 at a low potential of -1.51 V, accompanied by an NH 3 productivity of 123.5 mg h -1 mg cat. -1 . Theoretical calculations further reveal that phosphorous dopants facilitate the adsorption and activation of reactants/intermediates and thus lower the energy barrier.