Abstract
Selective catalytic reduction technology was considered to be the most effective technology for NOx treatment, and Mn2O3 had good catalytic activity. In this paper, we successfully synthesized α-Mn2O3 and γ-Mn2O3 nanorods by hydrothermal method. Moreover, in order to study the effects of surface physicochemical properties on the activities of Mn2O3 nanorods, XRD, Raman, FESEM, BET, H2-TPR, NH3-TPD, DRIFT and XPS were performed in detail. The results showed that the NH3-SCR performances of γ-Mn2O3 were better than that of α-Mn2O3. The H2-TPR, DRIFT and NH3-TPD results demonstrated that γ-Mn2O3 possessed stronger reducing ability, more acid sites and stronger acid strength than α-Mn2O3. In addition, the XPS results displayed that more chemisorbed oxygen existed on the surface of γ-Mn2O3 nanorods. Based on the above mentioned favourable properties, γ-Mn2O3 nanorods had an excellent performance than α-Mn2O3.
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