Selective catalytic reduction of NO_x with NH₃ over zeolite catalysts is recognized as the most practical technology used in mobile exhaust gases to transform NO_x into N₂. Despite a comprehensive structural-activity insight into Cu-zeolite SCR catalyst, Fe-zeolite, which is also popular in the automotive catalysis community, is necessary to be thoroughly investigated on micro-mechanism. This review summarizes the highlights and challenges in the application of Fe-zeolite, and simultaneously analyzes the reasons of some peculiar properties, such as the NH₃ inhibition effect at low temperatures, the low N₂O production and the sensitivity to NO₂/NO_x ratio in the feed. In addition, some feasible strategies are classified and summarized subsequently to provide suggestions for the improvement of low-temperature activity, the enhancement of resistance to hydrothermal aging and sulfur poisoning, the construction of controlled structure and the combination of Fe- and Cu- zeolites. Finally, the reaction mechanisms of NH₃-SCR over Fe-zeolites are concluded. After establishing a comprehensive overview of Fe-zeolite SCR catalysts, some directions that remain to be thoroughly explored on Fe-zeolite are put forward to assist the future catalyst design and investigation of NH₃-SCR.

在沸石催化剂上用NH ₃选择性催化还原NO _x是公认的最实用的技术，可用于移动废气中，将NO _x转化为N ₂。尽管对Cu沸石SCR催化剂具有全面的结构活性见解，但仍需要在微观机理上进行深入研究，Fe沸石在汽车催化领域也很流行。这篇综述总结了铁沸石应用中的亮点和挑战，同时分析了一些特殊性质的原因，例如低温下的NH ₃抑制作用，低N ₂ O产生和对NO ₂ / NO的敏感性。Feed中的_x比率。此外，对一些可行的策略进行了分类和总结，为提高低温活性，增强对水热老化和硫中毒的抵抗力，控制结构的构造以及铁和铜沸石的结合提供了建议。最后，总结了NH ₃ -SCR在Fe沸石上的反应机理。在建立了Fe-沸石SCR催化剂的综合概述之后，提出了一些有待进一步探索的指导，以帮助将来催化剂设计和NH ₃ -SCR的研究。