Spatially Nanoconfined Architectures: A Promising Design for Selective Catalytic Reduction of NOx

Nitrogen oxides, including NO and NO2, are notorious air pollutants. The selective catalytic reduction of NO(x)with NH3(NH3-SCR) is the most widely studied and used technology for NO(x)removal. The spatially confined architectures in porous materials are promising designs for NH3-SCR catalysts. Porous metal oxides, metal-based zeolite, and the metal organic frameworks catalysts, featuring active sites disperse in the pores, cavities, and frameworks, are the most widely studied NH3-SCR catalysts. In this review, we review the application of these three typical catalysts for NH3-SCR, emphasizing the spatial confined structure provided by the porous materials.