Phosphorus-doped TiCT MXene nanosheets enabling ambient NH 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. In this work, nitrate reduction to ammonia was achieved using P-doped Ti 3 C 2 T x nanosheets. Impressively, this catalyst showed ampere-level nitrate reduction in a flow cell, implying its potential for sustainable ammonia production.