Recent advances in different catalysts for synergistic removal of NOx and VOCs: A minor review

Volatile Organic Compounds (VOCs) and Nitrogen Oxides (NOx) are significant components of environmental pollution, causing significant damage to the Earth's ecosystem and human health. Catalytic technology offers the advantages of low cost and high catalytic efficiency. Among these, the development of novel catalysts is crucial to the advancement of catalytic technology methods. In recent years, researchers have conducted extensive studies and developed several novel catalysts that enable efficient catalytic treatment of multi-pollutants. The primary objective of this article is to examine the advancements made in the field of catalyst research pertaining to the synergistic catalysis of NOx and VOCs. It begins by reviewing the types, sources, risks, and abatement technologies for NOx and VOCs, as well as the current status of synergistic catalysis. The main part of the article is a systematic classification and review of different types of catalytic reaction systems. From the perspective of commercial vanadium-tungsten-titanium, transition metal, and noble metal catalysts, the latest research results of bifunctional catalysts in synergistic catalysis of VOCs and NOx are summarized in detail. Among them, the methods of synthesis of the catalysts, the relationship between the structure and the performance, and the effects of the two reaction pathways are discussed. Finally, the microscopic principle and the effect of each component on the catalytic reaction are explored, as well as the problems and weaknesses in the current practical application and the future development trend of VOCs and NOx synergistic catalysis.