Recent Advancements in Fe-Based Catalysts for the Efficient Reduction of NO x by CO

• Published in: Chemistry, an Asian journal an Asian journal, 2024-12, Vol.19 (23), p.e202400802
• Main Authors: Lian, Dianxing, Chen, Mohaoyang, Wang, Huanli, Li, Chenxi, Dai, Guiyao, Liu, Botao, Hou, Shujun, Zhang, Weiwei, Wu, Ke, Ji, Yongjun
• Format: Article
• Language: English
• ISSN: 1861-4728; 1861-471X
• DOI: 10.1002/asia.202400802

The technology of CO selective catalytic reduction of NO (CO-SCR) showcases the potential to simultaneously eliminate CO and NO from industrial flue gas and automobile exhaust, making it a promising denitrification method. The development of cost-effective catalysts is crucial for the widespread implementation of this technology. Transition metal catalysts are more economically viable than noble metal catalysts. Among these, Fe emerges as a prominent choice due to its abundant availability and cost-effectiveness, exhibiting excellent catalytic performance at moderate reaction temperatures. However, a significant challenge lies in achieving high catalytic activity at low temperatures, particularly in the presence of O , SO , and H O, which are prevalent in specific industrial flue gas streams. This review examines the use of Fe-based catalysts in the CO-SCR reaction and elucidates their catalytic mechanism. Furthermore, it also discusses various strategies devised to enhance low-temperature conversion, taking into account factors such as crystal phase, valence states, and oxygen vacancies. Subsequently, the review outlines the challenges encountered by Fe-based catalysts and offers recommendations to improve their catalytic efficiency for use in low-temperature and oxygen-rich environments.