Ammonia is one of the most produced chemicals in the world. However, the industrial Haber–Bosch progress is highly energy‐consumptive with large amounts of CO₂ emission. The electrochemical nitrogen reduction reaction (NRR), especially studies on noble‐metal‐free catalysts, has attracted incfeasing attention. In this Minireview, the reported noble‐metal‐free catalysts for NRR are summarized and the strategies for enhancing NRR catalytic activity and Faradaic efficiency discussed. Moreover, existing problems and future developments are put forward. The cover image shows the cycle process of N, the types of noble‐metal‐free NRR catalysts, as well as the synthesis strategies. More information can be found in the Minireview by Lihong Li, Yanlin Song et al.

中文翻译：

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封面：（Chem。Asian J. 14/2020）

氨是世界上生产最多的化学品之一。但是，哈伯-博世工业技术的进步是高能耗的，并排放大量的CO ₂。电化学氮还原反应（NRR），尤其是对无贵金属催化剂的研究，引起了越来越多的关注。在此Minireview中，总结了已报道的用于NRR的无贵金属催化剂，并讨论了提高NRR催化活性和法拉第效率的策略。此外，提出了存在的问题和未来的发展。封面图片显示了N的循环过程，不含贵金属的NRR催化剂的类型以及合成策略。有关更多信息，请参见Lihong Li，Yanlin Song等的Minireview。