Electrochemical N₂ reduction provides a green and sustainable alternative to the Haber-Bosch technology for NH₃ synthesis. However, the extreme inertness of N₂ molecules is a formidable challenge, which requires the development of an active electrocatalyst to drive the N₂ reduction reaction (NRR) for NH₃ production at ambient conditions. Herein, we demonstrate the development of La-doped TiO₂ nanorods as an efficient NRR electrocatalyst for ambient NH₃ synthesis. The optimized La-TiO₂ catalyst offers a large NH₃ yield of 23.06 μg h⁻¹ mg_cat⁻¹ and a high Faradaic efficiency of 14.54% at –0.70 V versus reversible hydrogen electrode in 0.1 M LiClO₄, outperforming most La- and Ti-based catalysts reported before. Significantly, it also demonstrates high electrochemical stability and its activity decay is negligible after 48 h test. The mechanism is further revealed by density functional theory calculations.

电化学 N ₂还原为用于 NH ₃合成的 Haber-Bosch 技术提供了一种绿色且可持续的替代方案。然而，N ₂分子的极端惰性是一项艰巨的挑战，这需要开发一种活性电催化剂来驱动 N ₂还原反应 (NRR)，以在环境条件下生产NH ₃。在此，我们展示了 La 掺杂的 TiO ₂纳米棒作为环境 NH ₃合成的有效 NRR 电催化剂的发展。优化的 La-TiO ₂催化剂提供了23.06 μg h ^-1 mg _cat ^-1的大 NH ₃产率和 0.1 M LiClO _{4 中的}可逆氢电极在 –0.70 V 下的法拉第效率为 14.54% ，优于之前报道的大多数 La 和 Ti 基催化剂。值得注意的是，它还表现出高电化学稳定性，并且在 48 小时测试后其活性衰减可以忽略不计。密度泛函理论计算进一步揭示了该机制。