尖晶石型LiMnO纳米纤维：一种在环境条件下将N还原为NH的高效电催化剂。
Spinel LiMnO Nanofiber: An Efficient Electrocatalyst for N Reduction to NH under Ambient Conditions.
作者信息
Li Chengbo, Yu Jiali, Yang Li, Zhao Jinxiu, Kong Wenhan, Wang Ting, Asiri Abdullah M, Li Quan, Sun Xuping
机构信息
College of Chemistry and Materials Science , Sichuan Normal University , Chengdu 610068 , China.
Institute of Fundamental and Frontier Sciences , University of Electronic Science and Technology of China , Chengdu 610054 , China.
出版信息
Inorg Chem. 2019 Aug 5;58(15):9597-9601. doi: 10.1021/acs.inorgchem.9b01707. Epub 2019 Jul 17.
The production of ammonia (NH) in the industrial scale basically relies on the traditional technology of Haber-Bosch, which is operated under harsh conditions with high energy consumption and a huge number of greenhouse gas emissions. Electrochemical N reduction reaction (NRR) is a promising route for artificial N-to-NH fixation with less energy consumption. However, an effective electrocatalyst, as a prerequisite of the NRR, is of significance. Here, we report that a spinel LiMnO nanofiber acts as a noble-metal-free electrocatalyst for NH synthesis with excellent performance under ambient conditions. The electrocatalyst, which was tested in 0.1 M HCl, has an excellent Faradaic efficiency of 7.44% and a NH yield of 15.83 μg h mg at -0.50 V versus reversible hydrogen electrode. Moreover, it also possesses excellent electrochemical and structure stability.
工业规模的氨（NH₃）生产基本上依赖于传统的哈伯-博施法，该方法在苛刻条件下运行，能耗高且温室气体排放量巨大。电化学氮还原反应（NRR）是一种有望实现人工固氮且能耗较低的途径。然而，有效的电催化剂作为NRR的先决条件至关重要。在此，我们报道一种尖晶石LiMnO₂纳米纤维在环境条件下作为无贵金属的电催化剂用于合成氨，具有优异的性能。该电催化剂在0.1 M HCl中进行测试，相对于可逆氢电极，在-0.50 V时具有7.44%的优异法拉第效率和15.83 μg h⁻¹ mg⁻¹的氨产率。此外，它还具有优异的电化学和结构稳定性。
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