Improvement on the Catalytic Performance of MoO3 Nanobelts for NH3-SCR Reaction by SnO2-Modification: Enhancement of Acidity and Redox Property

The development of environmental benign catalysts is the focus on the selective catalytic reduction (SCR) of NOx. In this study, a series of SnO2-modified MoO3 nanobelts were fabricated by simple impregnation method and applied in the SCR reaction of NO with NH3. On these samples, the SnO2 component disperses evenly on the surface of MoO3 nanobelts, and some synergistic effect exists between the SnO2 component and the MoO3 support. When the content of the loaded SnO2 was 10 wt%, the obtained 10SnO(2)/MoO3 catalyst exhibits superior catalytic performance in the SCR reaction. Notably, the SnO2/MoO3 catalysts possess great resistance for SO2 and H2O in the reaction as well. The modification of SnO2 could significantly promote the redox property, increase the surface acid sites and the surface chemisorbed oxygen species of the catalysts, which were key factor for the good NH3-SCR catalytic performance of the SnO2/MoO3 catalysts. [GRAPHICS] .

Automated summary

The study focused on the development of environmental benign catalysts for the selective catalytic reduction (SCR) of NOx. SnO2-modified MoO3 nanobelts were fabricated and applied in the SCR reaction of NO with NH3, showing superior catalytic performance at 10 wt% SnO2 loading. The modified SnO2 could significantly enhance the redox property and surface chemisorbed oxygen species of the catalysts, contributing to their good NH3-SCR catalytic performance.