Citation: Zaisheng Jin, Fuli Wang, Yongjie Shen, Xiaonan Hu, Yanqi Chen, Jin Zhang, Ming Xie, Penglu Wang, Dengsong Zhang. Iron-based catalysts for NO_x reduction: Reaction mechanism and anti-poisoning strategies[J]. Chinese Chemical Letters, ;2026, 37(4): 111733. doi: 10.1016/j.cclet.2025.111733 shu

Iron-based catalysts for NO_x reduction: Reaction mechanism and anti-poisoning strategies

Zaisheng Jin ^{a, 1} ,
Fuli Wang ^{a, 1} ,
Yongjie Shen ^{a, b} ,
Xiaonan Hu ^a ,
Yanqi Chen ^a ,
Jin Zhang ^a ,
Ming Xie ^c ,
Penglu Wang ^{a, *,} ,
Dengsong Zhang ^{a, *,}

a.
International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Innovation Institute of Carbon Neutrality, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
b.
Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
c.
Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom

plwang@shu.edu.cn

dszhang@shu.edu.cn

Received Date: 4 March 2025
Revised Date: 28 June 2025
Accepted Date: 15 August 2025
Available Online: 17 August 2025

Figures(11)

Iron-based metal oxide catalysts are widely used for selective catalytic reduction (SCR) of NO_x with NH₃ due to their excellent catalytic performance at medium and high temperatures, high nitrogen selectivity, robust resistance to sulfur dioxide poisoning, environmental sustainability and cost effectiveness. However, several challenges including sub-optimal low-temperature catalytic activity, narrow operating temperature range, poor resistance to alkali/alkaline earth metal poisoning, as well as insufficient thermal stability and H₂O/SO₂ resistance always hinder the further application of iron-based metal oxide catalysts, which is in urgent need of further improvement in practical applications. This review provides a comprehensive overview of the development, applications and challenges associated with different types of iron-based metal oxide catalysts and suggests corresponding modification strategies to address the as-mentioned issues. Iron oxide catalysts can promote low-temperature catalytic performance by adjusting crystal structures and exposing specific crystal faces; however, their thermal stability and resistance to SO₂/H₂O and alkali metals still have substantial room for improvement. Iron-based composite metal oxide catalysts can effectively increase the resistance to SO₂/H₂O by coupling multiple metals and modulating adjacent electronic sites. Iron-based acidic salt catalysts greatly enhance the resistance to alkali metal poisoning by enriching the surface acid sites and providing sacrificial sites. Supported iron-based metal oxide catalysts can significantly improve both catalytic performance and resistance by modulating reaction pathways and constructing core-shell structures. This review clarifies the important direction of further research on iron-based metal oxide catalysts, and provides scientific basis and design ideas for the development and application of high-efficiency low-temperature NO_x reduction catalysts.
- Nitric oxide,
- Selective catalytic reduction,
- Iron-based catalysts,
- Anti-poisoning,
- Environmental catalysis
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Iron-based catalysts for NOx reduction: Reaction mechanism and anti-poisoning strategies

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通讯作者: 陈斌, bchen63@163.com

Iron-based catalysts for NO_x reduction: Reaction mechanism and anti-poisoning strategies