Key Laboratory of Chemical Synthesis and Pollution Control of Sichuan Province, School of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, Sichuan, China.
Nanoscale. 2018 Aug 2;10(30):14386-14389. doi: 10.1039/c8nr04524k.
Industrially, NH3 is mainly produced via the Haber-Bosch process which is not only energy-consuming but emits a large amount of CO2. Electrochemical reduction is regarded as an environmentally-benign alternative for sustainable NH3 synthesis, and its efficiency heavily depends on the identification of Earth-abundant catalysts with high activity for the N2 reduction reaction (NRR). In this work, we report that a spinel Fe3O4 nanorod on a Ti mesh (Fe3O4/Ti) acts as an efficient and durable NRR electrocatalyst under ambient conditions. When tested in 0.1 M Na2SO4, such Fe3O4/Ti achieves a high faradaic efficiency of 2.6% and a NH3 yield 5.6 × 10-11 mol s-1 cm-2 and at -0.4 V vs. a reversible hydrogen electrode.
工业上，氨主要通过 Haber-Bosch 工艺生产，该工艺不仅耗能大，而且还会排放大量二氧化碳。电化学还原被认为是可持续合成氨的一种环境友好型替代方法，其效率很大程度上取决于对具有高氮还原反应（NRR）活性的丰富地球催化剂的识别。在这项工作中，我们报告了一种尖晶石 Fe3O4 纳米棒负载在 Ti 网上（Fe3O4/Ti），在环境条件下可作为高效且耐用的 NRR 电催化剂。在 0.1 M Na2SO4 中进行测试时，这种 Fe3O4/Ti 在相对于可逆氢电极的-0.4 V 下，实现了 2.6%的高法拉第效率和 5.6×10-11 mol s-1 cm-2的氨生成量。
