Nitrate (NO₃⁻), a nitrogen-containing pollutant, is prevalent in aqueous solutions, contributing to a range of environmental and health-related issues. The electrocatalytic reduction of NO₃⁻ holds promise as a sustainable approach to both eliminating NO₃⁻ and generating valuable ammonia (NH₃). Nevertheless, the reduction reaction of NO₃⁻ (NO₃⁻RR), involving 8-electron transfer process, is intricate, necessitating highly efficient electrocatalysts to facilitate the conversion of NO₃⁻ to NH₃. In this study, Fedoped Co₃O₄ nanowire strutted three-dimensional (3D) pinewood-derived carbon (Fe-Co₃O₄/PC) is proposed as a high-efficiency NO₃⁻RR electrocatalyst for NH₃ production. Operating within 0.1 M NaOH containing NO₃⁻, Fe-Co₃O₄/PC demonstrates exceptional performance, obtain an impressively large NH₃ yield of 0.55 mmol·h⁻¹·cm⁻² and an exceptionally high Faradaic efficiency of 96.5% at −0.5 V, superior to its Co₃O₄/PC counterpart (0.2 mmol·h⁻¹·cm⁻², 73.3%). Furthermore, the study delves into the reaction mechanism of Fe-Co₃O₄ for NO₃⁻RR through theoretical calculations.

硝酸盐 (NO ₃ ⁻ ) 是一种含氮污染物，在水溶液中普遍存在，会导致一系列环境和健康相关问题。_{NO 3} ^-的电催化还原有望成为消除 NO ₃ ^-并产生有价值的氨 (NH ₃ ) 的可持续方法。_{然而，NO 3} ^- (NO ₃ ^- RR)的还原反应涉及8电子转移过程，非常复杂，需要高效的电催化剂来促进NO ₃ ^-转化为NH ₃。在本研究中，Fe掺杂Co ₃ O ₄纳米线支撑三维（3D）松木衍生碳（Fe-Co ₃ O ₄ /PC）被提议作为高效NO ₃ ⁻ RR电催化剂用于NH ₃生产。在含有 NO ₃ ^-的 0.1 M NaOH 中操作，Fe-Co ₃ O ₄ /PC 表现出卓越的性能，获得了令人印象深刻的0.55 mmol·h ^-1 ·cm ^{-2的大 NH} ₃产率和 96.5% 的极高法拉第效率。 -0.5 V，优于其Co ₃ O ₄ /PC对应物（0.2 mmol·h ^-1 ·cm ^-2 , 73.3%）。此外，该研究还通过理论计算 深入探讨了Fe-Co ₃ O ₄对NO ₃ ⁻ RR的反应机理。