A novel MnCoOx@TiO2 double-wall nanocages derived from Prussian blue analogue for NH3-SCR of NOx
FUEL（2024）
摘要
By annealing the self-assembled Mn-3[Co(CN)(6)](2)nH(2)O@Ti(OH)(4), MnCoOx@TiO2 double-walled nanocage catalysts were obtained. Excellent low-temperature NH3-SCR performance (above 90 % NO conversion efficiency at 200-325 degrees C), acceptable stability, and exceptional SO2 resistance were demonstrated. According to a series of characterizations, the MnCoOx@TiO2 catalysts were found to have an enlarged specific surface area, improved surface acidity and redox ability, enhanced dispersion of active components, and abundantly formed adsorbed oxygen (O-ads) species, which consequently exhibited the improved deNO(x) performance. Meanwhile, the coating of the TiO2 shell reduced the basic sites to adsorb SO2, hence leaving a certain proportion of active metal oxides preserved. Apparently, the MnCoOx@TiO2 catalysts were observed to have an enhanced SO2-resistant ability.
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关键词
NH3-SCR,Core-shell structure,MOF derived catalysts,Synergistic effect,SO2 tolerance
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