Phosphorus-doped Ti₃C₂T MXene nanosheets enabling ambient NH₃ synthesis with high current densities

Herein, we show that P-doped Ti₃C₂T MXene nanosheets can effectively catalyze the NO₃RR-to-NH₃ 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 NH₃ 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.