Lithium Iron Oxide (LiFeO2) for Electroreduction of Dinitrogen to Ammonia.,ACS Applied Materials & Interfaces

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Lithium Iron Oxide (LiFeO2) for Electroreduction of Dinitrogen to Ammonia.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-07-29 , DOI: 10.1021/acsami.0c10991
Weicong Gu ₁ , Yali Guo ₁ , Qingqing Li ₁ , Ye Tian ₂ , Ke Chu ₁

Affiliation

Electrochemical nitrogen fixation offers a promising route for sustainable NH₃ production, while the rational design of effective and durable electrocatalysts is urgently required for an effective nitrogen reduction reaction (NRR) process. Herein, we explore lithium iron oxide (LiFeO₂) as a potential NRR catalyst. The developed LiFeO₂/reduced graphene oxide (rGO) delivered a combination of both a high NH₃ yield (40.5 μg h^–1 mg^–1) and high Faradaic efficiency (16.4%), exceeding those of nearly all the previously reported Li- and Fe-based catalysts. Theoretical computations showed that Fe and Li atoms on the LiFeO₂ (111) facet synergistically activated N₂ while Fe atoms served as the key active centers. Meanwhile, the undesired HER can be well impeded on both Fe and Li atoms to enable a high NRR selectivity.

中文翻译：

氧化锂铁（LiFeO2），用于将二氮电还原为氨。

电化学固氮技术为可持续的NH ₃生产提供了一条有希望的途径，而有效的氮还原反应（NRR）工艺迫切需要有效和耐用的电催化剂的合理设计。在本文中，我们探索锂铁氧化物（LiFeO ₂）作为潜在的NRR催化剂。发达的LiFeO ₂ /还原氧化石墨烯（rGO ）兼具高NH ₃产量（40.5μgh ^–1 mg ^–1）和高法拉第效率（16.4％）的组合，几乎超过了以前报道的所有Li-O和铁基催化剂。理论计算表明，LiFeO ₂（111）面上的Fe和Li原子可协同激活N_2，而Fe原子是关键的活性中心。同时，不需要的HER可以很好地阻碍Fe和Li原子，从而实现较高的NRR选择性。

更新日期：2020-08-19

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