Effect of SBA-15 Morphology in the Catalytic Performance of Pt/Ce-SBA-15 Catalyst for NOx Reduction

This research used hydrothermal technique to synthesize three different morphologies of SBA-15 supports, such as rod, hexagonal prism, and spherical. Afterward, it impregnated Pt/Ce metal on the SBA-15 supports via wet-impregnation methods and investigated their NO reduction activity using the H2-SCR technique in the temperature range of 50-450degree celsius. The catalysts were characterized by Brunauer-Emmett-Teller (BET), X-Ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy, energy dispersive X-ray spectroscopy (SEM-EDS), Transmission electron microscopy (TEM), and Raman spectroscopy. Among the catalysts, Pt/Ce-SBA-15-rod exhibited the best performance with NO conversion of 52.23% and N2 selectivity of more than 83.25% at 150degree celsius. The Pt/Ce-SBA-15-rod catalysts' activation energy (21.188 kJ-mol- 1) was the lowest of all the catalysts. The catalysts with the highest NO conversion have the highest BET properties, surface oxygen (30.33%), Ce3+ (40.23%), Pt (0) (70.45%), and oxygen storage capacity.