Selective ammonia production via nitrite electroreduction over CoFe layered double hydroxides-decorated 3D TiO 2 array

作者：Yi Liang, Xiaoya Fan, Xun He, Dongdong Zheng, Shengjun Sun, Yongsong Luo, Hao Chen, Xuping Sun · 发表于：Nano Research · 年份：2025 · DOI：10.26599/nr.2025.94907344 · 被引用次数：54 · 研究领域：Ammonia Synthesis and Nitrogen Reduction、Advanced Photocatalysis Techniques、Caching and Content Delivery

Water-soluble nitrite (NO 2 − ) in wastewater from agricultural and industrial activities poses ecological and health risks, and its electroreduction shows promise for ammonia (NH 3 ) production, but energy losses from the hydrogen evolution reaction (HER) limit its overall efficiency. In this work, we report the use of CoFe-layered double hydroxides on 3D TiO 2 array (TiO 2 @CoFe-LDH/TP) as an effective electrocatalyst for NO 2 − reduction. By offering superior *H species supply and hydroprocessing capability, this catalyst achieves an NH 3 yield of 1056.4 μmol h −1 cm −2 with a 97.4% Faradaic efficiency (FE) at −0.6 V and sustains FE above 87% across a range of applied potentials. Additionally, a 60-h simulated wastewater treatment experiment demonstrates its practical application potential.