The electrocatalytic nitrogen reduction reaction (NRR) has emerged as a promising renewable energy source and a feasible strategy as an alternative to Haber-Bosch ammonia (NH₃) synthesis. However, finding an efficient and cost-effective robust catalyst to activate and cleave the extremely strong triple bond in nitrogen (N₂) for electrocatalytic NRR is still a challenge. Herein, a FeNi@CNS nanocomposite as an efficient catalyst for N₂ fixation under ambient conditions is designed. This FeNi@CNS nanocomposite was prepared by a simple water bath process and post-calcination. The FeNi@CNS is demonstrated to be a highly efficient NRR catalyst, which exhibits better NRR performance with exceptional Faradaic efficiency of 9.83% and an NH₃ yield of 16.52 μg h ^{− 1} cm⁻² in 0.1 M Na₂SO₄ aqueous solution. Besides, high stability and reproducibility with consecutive 6 cycles for two hours are also demonstrated throughout the NRR electrocatalytic process for 12 h. Meanwhile, the FeNi@CNS catalyst encourages N₂ adsorption and activation as well as effectively suppressing competitive HER. Therefore, this earth-abundant FeNi@CNS catalyst with a subtle balance of activity and stability has excellent potential in NRR industrial applications.

电催化氮还原反应 (NRR) 已成为一种有前途的可再生能源，并且是替代 Haber-Bosch 氨 (NH ₃ ) 合成的可行策略。然而，寻找一种高效且具有成本效益的稳健催化剂来激活和裂解氮 (N ₂ ) 中极强的三键以用于电催化NRR 仍然是一个挑战。在此，设计了一种 FeNi@CNS 纳米复合材料作为环境条件下N ₂固定的有效催化剂。这种 FeNi@CNS 纳米复合材料是通过简单的水浴工艺和后煅烧制备的。FeNi@CNS 被证明是一种高效的 NRR 催化剂，表现出更好的 NRR 性能，具有 9.83% 的卓越法拉第效率和 NH ₃在0.1 M Na ₂ SO ₄水溶液中的产率为16.52 μg h ^{- 1} cm ^-2。此外，在整个 NRR 电催化过程 12 小时内，连续 6 次循环两小时的高稳定性和重现性也得到了证明。同时，FeNi@CNS催化剂促进N ₂吸附和活化，并有效抑制竞争性HER。因此，这种地球丰富的 FeNi@CNS 催化剂在活性和稳定性之间取得了微妙的平衡，在 NRR 工业应用中具有巨大的潜力。