Vanadia (V₂O₅)- and manganese (MnO_x)-based catalysts are widely used in the selective catalytic reduction (SCR) process for NO_x removal from various sources, particularly in diesel engines. Extensive research has been carried out to modify the traditional V₂O₅- and MnO_x-based SCR catalysts to overwhelm their disadvantages such as low thermal stability, ammonia slip and insufficient Hg⁰ oxidation. This review focuses on the advancement in the modification of V₂O₅- and MnO_x-based SCR catalysts in different aspects like increasing thermal stability, oxidizing slip ammonia, reducing SO₂ oxidation, improving Hg⁰ oxidation efficiency, enhancing N₂ selectivity and expanding the operation temperature window. The performances of various V₂O₅- and MnO_x-based SCR catalysts have been examined in detail and also categorized based on materials such as transition metals, rare earth metals, noble metals and others. According to the previous studies and researcher's perspective, it was noticed that doping of suitable components promotes the overall performance of V₂O₅- and MnO_x-based SCR catalysts. The incorporation of transition metals into V₂O₅- and MnO_x-based catalytic systems has shown a vast potential to control various pollutants in the exhaust gas after-treatment techniques.

中文翻译：

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改性TiO2-和碳载V2O5-和MnOx-基催化剂对NOx选择性催化还原的促进作用：综述

钒（V ₂ O ₅）和锰（MnO _x）基催化剂广泛用于选择性催化还原（SCR）工艺中，以从各种来源中去除NO _x，特别是在柴油发动机中。已经进行了广泛的研究以改性传统的基于V ₂ O ₅和MnO _x的SCR催化剂，以克服它们的缺点，如热稳定性差，氨泄漏和Hg ⁰氧化不足。这篇综述着重于V ₂ O _5-和MnO _x的改性研究进展系SCR催化剂在各个方面都有所提高，如提高热稳定性，氧化氨水，减少SO ₂氧化，提高Hg ⁰氧化效率，提高N ₂选择性和扩大操作温度范围。已经详细检查了各种基于V ₂ O ₅和MnO _x的SCR催化剂的性能，并根据过渡金属，稀土金属，贵金属等材料进行了分类。根据以前的研究和研究人员的观点，已经注意到，掺杂合适的组分可以提高V ₂ O _5-和MnO _x的整体性能。基SCR催化剂。在基于V ₂ O ₅和MnO _x的催化体系中掺入过渡金属已显示出控制废气后处理技术中各种污染物的巨大潜力。