Emerging artificial nitrogen cycle processes through novel electrochemical and photochemical synthesis
Emerging artificial nitrogen cycle processes through novel electrochemical and photochemical synthesis
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DOI：
10.1016/j.mattod.2021.01.029
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发表时间：
2021-06-10
期刊：
影响因子：
24.2
通讯作者：
Ni, Bing-Jie
中科院分区：
文献类型：
--
作者：
Hao, Derek;Liu, Yang;Ni, Bing-Jie
氮循环是全球生物地球化学循环的重要组成部分，而人类活动已经造成了全球氮循环的严重失衡。在这篇综述中，我们提出了一种基于电化学和光催化反应的新一代人工氮循环。具体地说，空气中的N-2、含NO3-/NO2的废水、汽车尾气中的氮氧化物都可以作为氮源在常温下合成NH3。NH3、N-2和氮氧化物的氧化都可以达到生成NO3-的目的。肼还可以通过电化学反应和光化学反应合成。利用电化学和光催化技术可以消除含氮有机物和部分无机氮污染废水的危害。更重要的是，将氮基反应与二氧化碳还原等其他反应相结合，可以合成一些高价值的化学品，如尿素。然后重点介绍了近年来在这些反应中取得的一些成果，并提出了一些潜在的发展方向。这项工作的结果和资金可能有助于我们为人工氮循环开发高效的催化剂和策略，修复打破的氮循环平衡。
The nitrogen cycle is an important part of the global biogeochemical cycle, while the human activities have already caused a severe imbalance of the global nitrogen cycle. In this review, we proposed a new generation of artificial nitrogen cycle via electrochemical and photocatalytic reactions. In details, the N-2 from the air, NO3-/NO2- containing wastewater, nitrogen oxides from vehicle emission are all able to be utilized as a nitrogen source for the synthesis of NH3 under ambient conditions. The oxidation of NH3, N-2 and nitrogen oxides can all achieve the aim of obtaining NO3-. Hydrazine can also be synthesized electrochemical and photochemical reactions. Utilizing electrochemical and photocat-alytic processes enables to eliminate the hazardous of nitrogen-containing organic chemicals, and some inorganic nitrogen polluted wastewater. More importantly, coupling N-based reaction with other reaction like CO2 reduction enables to synthesize some high-value chemicals such as urea. Then we highlighted some recent achievements in these reactions and proposed some future potential developing directions. The results and funding of this work may help us develop highly efficient catalysts and strategies for the artificial nitrogen cycle, repairing the broken nitrogen cycle balance.