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 NOx with NH3 (NH3−SCR) is the most widely studied and used technology for NOx 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. NH3−SCR catalysts: The selective catalytic reduction of NOx with NH3 draw enormous attentions due to the highly efficient removal of NOx. The catalysts are the core of the NH3−SCR process. The spatial confined architecture is a promising design for the NH3−SCR catalysts. The spatial confinement effects on the active sites provided by the channels of porous metal oxides, the cavities of zeolites, and the frameworks of MOFs are highlighted in this minireview.