The “FeMo cofactors” in biological nitrogenase play a decisive role in nitrogen reduction. Herein, a novel bionic Fe/Mo bimetallene was applied in photocatalytic nitrogen reduction. The surface coating Fe/Mo bimetallene of Bi₂Mo_0.3W_0.7O₆ (BMWO) nanocrystals could effectively promote the separation and transportation of photogenerated carriers by multi–electron redox reactions and deliver 2.8 times longer photo–carrier lifetime. Consequently, the nitrogen fixation activity of Fe/Mo bimetallene–coated BMWO nanocrystal photocatalyst was obviously enhanced (218.93 μmol g^–1h⁻¹), which was about 4.8 times that of unmodified BMWO nanocrystals. This work provides a novel approach to design bionic Fe/Mo bimetallene–modified inorganic semiconductor photocatalysts for nitrogen reduction.

生物固氮酶中的“FeMo辅因子”在氮还原中起决定性作用。在此，一种新型仿生 Fe/Mo 双金属烯应用于光催化氮还原。Bi ₂ Mo _0.3 W _0.7 O ₆ (BMWO)纳米晶体的表面包覆Fe/Mo双金属烯可以通过多电子氧化还原反应有效促进光生载流子的分离和传输，并使光载流子寿命延长2.8倍。因此，Fe/Mo双金属烯包覆的BMBO纳米晶光催化剂的固氮活性明显增强（218.93 μmol g ^–1 h ^-1)，约为未改性 BMWO 纳米晶体的 4.8 倍。这项工作为设计用于氮还原的仿生 Fe/Mo 双金属改性无机半导体光催化剂提供了一种新方法。