Progress in selective electrochemical reduction of nitrate into ammonia
Journal Title: Energy Environmental Protection - Year 2023, Vol 37, Issue 4
Abstract
Selective electrochemical reduction of nitrate (NO3-) into ammonia (NH_3) is critical for environmental remediation and resource recovery. This review comprehensively summarizes the recent advances in electrochemical conversion of NO3- into NH_3. Mechanisms of NO3- reduction are discussed. The conversion of NO3- into NO_2 and formation of N—H is the key for achieving high selectivity of NH3. The technologies and strategies for enhancing the performance of electrode are summarized and compared. The crystal structure, morphology and charge density of materials are the key factors affecting the properties of electrode materials. The influence of electrochemical reactor on NO3- conversion and NH_3 formation is described. The core of electrolytic cell is to avoid anode interference and in-situ realize NH_3 separation and recovery. With these facts, it is proposed that the strategies for NO3- electrochemical selective reduction synthesis of NH_3 are the development of low-cost, stable, and efficient electrode materials and electrochemical synthesis and in-situ separation of NH_3 reactor. Besides, the long-term large-scale research on the electrochemical synthesis of NH_3 from actual NO3- wastewater is critical for promoting the industrialization of this technology.
Authors and Affiliations
LI Zhizhuo|School of Metallurgy and Environment, Central South University, China, YAO Fubing|School of Metallurgy and Environment, Central South University, China, WU Xing|School of Metallurgy and Environment, Central South University, China, GAO Tianyu|School of Metallurgy and Environment, Central South University, China, SONG Zhenhui|School of Metallurgy and Environment, Central South University, China, CHAI Xilin|Jiangxi Gaiya Environmental Protection Technology Company, China, TANG Chongjian*|School of Metallurgy and Environment, Central South University, China,
Keywords
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- EP ID EP737975
- DOI 10.20078/j.eep.20230601
- Views 47
- Downloads 0
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