  Ammonia NH3 is an important raw material for nitrogen fertilizer production
and is widely used in industry. It is also a carbon free renewable fuel and an
excellent hydrogen storage material. Reaction conditions of traditional Haber
Bosch process are very harsh although it supports most of todays NH3
production. Recently, electrocatalytic nitrogen reduction reaction NRR has
become one of the effective alternative methods to the traditional Haber Bosch
process due to the advantages of mild operation conditions and almost no
environmental pollutions. Ionic liquids ILs act as one of green solvents
possess a lot of unique features and have shown excellent performance in
electrocatalytic NRR process. In this review, we summarize fundamentals of the
electrocatalytic NRR, the role of ILs in several typical electrocatalytic
processes, and the possible role of ILs in the electrocatalytic NRR process.
Moreover, the selection principles and issues of the application of ILs, as
well as the future development direction for the electrocatalytic NRR process
are concluded.
