Hard-Templating Synthesis of Mesopours La_1-xSr_xMnO_3+σ Perovskite and Catalysis Activity in CO Oxidation

Abstract:

La_1-xSr_xMnO_3+σ perovskite/ySBA-15(x=0, 0.1, 0.2, 0.3、y=0, 1, 2, 3) catalyzers were prepared by two different methods, which are the hard-templating and sol-gel methods. The catalysts were characterized by Fourier transform infrared spectroscopy(FTIR), scanning electron microscopy(SEM), energy-dispersive spectroscopy(EDS), X-ray fluorescence spectroscopy(XRD) and N₂ adsorption/desorption(BET). Their catalytic activity in the oxidation of CO was evaluated. BET and SEM results showed that the repeated template samples had higher surface area(143.7m2/g) and smaller particle size(18nm). The catalytic activity for CO reached the highest value when x=0.2 and y=2. The repeated template samples had higher activity than the sol-gel samples due to the higher surface area.

• Periodical: Advanced Materials Research (Volumes 306-307)
• Pages: 1342-1349
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.306-307.1342
• Online since: August 2011
• Authors: Xue Hui Huang, Ming Li
• Keywords: Hard-Templating, Mesoporous Catalyst, Perovskite, Wet Impregnation

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