Electrochemical nitrogen reduction: recent progress and prospects

Debabrata Chanda, Ruimin Xing, Tong Xu, Qian Liu, Yonglan Luo, Shanhu Liu*, Ramatu Ashu Tufa, Tarekegn Heliso Dolla, Tiziano Montini, Xuping Sun*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

Abstract

Ammonia is one of the most useful chemicals for the fertilizer industry and is also promising as an important energy carrier for fuel cell application, and is currently mostly produced by the traditional Haber-Bosch process under high temperature and pressure conditions. This energy-intensive process is detrimental to the environment due to the dependence on fossil fuels and the emission of significant greenhouse gases (such as CO2). Ammonia productionviathe electrochemical nitrogen reduction reaction (ENRR) has been recognized as a green sustainable alternative to the Haber-Bosch process in recent years. Current ENRR research mainly focuses on the catalyst for ammonia selective production and the enhancement of faradaic efficiency at high current density; however, these have not been explored well due to the unavailability of highly efficient and cheap catalysts. Herein, this review provides information on the ENRR process along with (i) theoretical background, (ii) experimental methodology of the electrocatalytic process and (iii) computational screening of promising catalysts. The impact of active sites and defects on the activity, selectivity, and stability of the catalysts is deeply understood. Furthermore, we demonstrate the mechanistic understanding of the ENRR process on the surface of catalysts, with the aim of boosting the improvement of the ENRR activities. The ammonia detection methods are also summarized along with thorough discussion of control experiments. Finally, this review highlights prevailing problems in existing ENRR methods of ammonia production along with technical advancements proposed to address these issues and concludes with comments on opportunities and future directions of the ENRR process.
Original languageEnglish
JournalChemical Communications
Volume57
Issue number60
Pages (from-to)7335-7349
Number of pages15
ISSN1359-7345
DOIs
Publication statusPublished - 2021

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