Recent Advances in Electrocatalysts toward Nitrate Reduction Reaction for Ammonia Synthesis

Ammonia (NH3) is not only an essential raw material for the production of nitrogenous fertilizers but also a promising carbon‐free energy carrier. The electrocatalytic NO3− reduction reaction (eNO3RR) not only solves the NO3− pollution but also facilitates renewable NH3 production under ambient conditions. However, the NH3 productivity is still too low to meet the requirements for practical applications. Thus, suitable electrocatalysts are required. This review highlights the latest important progresses of electrocatalysts for eNO3RR. Firstly, the reaction pathways of eNO3RR are reviewed briefly. Then, various electrocatalysts including noble metal and non‐noble metal materials for eNO3RR are reviewed, with a special emphasis on the relationship between their structures and eNO3RR performance. Lastly, the challenges and prospects in this field are discussed. This review may provide a guide for development of efficient electrocatalysts for eNO3RR.