Electrocatalytic N₂ reduction reaction (NRR) offers a promising low-energy, sustainable ammonia-synthesizing alternative to Haber-Bosch reaction. One roadblock lying in access to high-performance ammonia electrosynthesis emanates from the unsatisfied ability of electrocatalysts to wreck N≡N bond. Here, we report that interfacial polarization is an efficient scenario to enhance N≡N fracture to boost electrocatalytic ammonia synthesis. As a proof-of-concept demonstration, protrusion-shaped Fe single-atom catalysts immobilized onto MoS₂ nanosheets engender electric fields to polarize N₂. The resultant interfacial polarization fields between Fe-MoS₂ and N₂ drive the injection of more electrons into N₂ antibonding orbitals in a fast manner, leading to a superior ammonia-evolving rate (36.1 ± 3.6 mmol g⁻¹ h⁻¹ or 97.5 ± 6 μg h⁻¹ cm⁻²) at low applied potential. Similar phenomena are applicable in Co-MoS₂, Cu-MoS₂, Rh-MoS₂, or Ru-MoS₂, suggesting the potential universality of our interfacial polarization concept in upgrading wide-scope catalysis.

电催化N ₂还原反应（NRR）提供了一种有希望的低能量，可持续的氨合成方法，可替代Haber-Bosch反应。获得高性能氨电合成的障碍之一是电催化剂破坏N≡N键的能力不令人满意。在这里，我们报告界面极化是增强N≡N断裂以促进电催化氨合成的有效方案。作为概念验证，固定在MoS ₂纳米片上的突起形Fe单原子催化剂产生电场以极化N ₂。Fe-MoS ₂和N ₂之间的界面极化场会驱动更多的电子注入N₂个快速形成反键的轨道，在较低的施加电势下，氨析出速率较高（36.1±3.6 mmol g ^-1 h ^-1或97.5±6μgh ^-1 cm ^-2）。类似的现象适用于Co-MoS ₂，Cu-MoS ₂，Rh-MoS ₂或Ru-MoS ₂，这表明我们的界面极化概念在升级宽光谱催化方面具有潜在的普遍性。