LaBO3/attapulgite (ATP) (B=Mn, Fe, Co, Ni) composites were prepared by sol–gel method using citric acid as complex agent. The products were characterized by X-ray diffraction transmission electron microscopy, energy-dispersive spectroscopy, Battett–Emmett–Teller, fourier-transform infrared, H2 temperature-programmed reduction and temperature-programmed desorption of NH3 measurements. The catalytic activity of LaBO3/ATP nanocomposites was evaluated via selective catalytic reduction of NO with NH3 by fixed bed denitration equipment at low-temperature. The impact of the various B-site elements on the NO conversion was investigated. Results showed that the adsorption capacity of NH3 played significant role in the low temperature denitrification process, and Mn was the best B-site element where LaMnO3/ATP achieves 81% conversion of NO at 250 °C.
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This work was supported by the National Science Foundation of China (51674043), Jiangsu Technology Support Program (BE2014100, BE2015103, BE2016654), Jiangsu International Cooperation Project (BZ2015040), Social Development Fund of Changzhou City (CE20165022) and Key R&D Fund of Huai’an city (HAG2015073).