One-pot synthesis of hollow single crystal SSZ-13 zeolite by creating aluminum gradients with excellent activity for NH3-SCR

Hollow zeolite single crystals have received extensive attention due to their unique cavities and outstanding catalytic performance. Although many kinds of zeolites have been synthesized with hollow structures, the related synthesis of hollow SSZ-13 zeolites has not been reported yet. In this work, we first synthesized hollow zeolite SSZ-13 single crystals by a simple and economical strategy without additional templates, which involves adjusting the spatial chemistry distribution of elements throughout the crystals to create Al-zoned and forming cavity by selective desiliconization. Furthermore, we doped the synthesized hollow zeolite SSZ-13 with copper, and the hollow Cu-SSZ-13 zeolite exhibits an enhanced catalytic activity of selective catalytic reduction (SCR) of NOx with NH3 compared with the traditional solid Cu-SSZ-13.

Automated summary

Hollow zeolite SSZ-13 single crystals were successfully synthesized in this study without using additional templates, by adjusting the spatial chemistry distribution of elements and forming cavities through selective desiliconization. Furthermore, doping with copper resulted in enhanced catalytic activity of hollow Cu-SSZ-13 zeolite in the selective catalytic reduction (SCR) of NOx with NH3 compared to traditional solid Cu-SSZ-13.