Iron Doped Lanthanum Stannate Pyrochlores (La₂Sn_2-XFe_XO₇) for the Simultaneous Catalytic Removal NOx and Soot

Abstract:

A series of La₂Sn_2-xFe_xO₇ (x=0, 0.2, 0.6, 1.0, 1.4, 1.8, 2.0) catalysts were prepared by a constant pH co-precipitation method, and their catalytic activity was investigated for simultaneous removal of NOx and soot. The incorporation of Fe strongly influences the crystal phase composition, surface area and redox properties of the catalysts. All the catalysts displayed soot oxidation activity with nearly 100% selectivity towards CO₂. The doped solids exhibit higher activities than the undoped one, which may be related to the enhancement of reducibility derived from structure defects induced by doping. LSF0.6 may be a good catalyst with high soot oxidation activity (T_i = 334 °C) and a high maximum productivity of N₂ (P_N2= 12.4%).

• Periodical: Advanced Materials Research (Volumes 306-307)
• Pages: 1468-1472
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.306-307.1468
• Online since: August 2011
• Authors: Zhong Peng Wang, Zi Zi Wang, Xiao Wang, Qian Li, Zong Gang Mu, Zhao Liang Zhang
• Keywords: Iron Doping, Lanthanum Stannate Oxides, NO_x, Pyrochlore, Simultaneous Removal, Soot

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