Simultaneous catalytic removal of NOx and diesel soot particulates over La1−xCexNiO3 perovskite oxide catalysts
Simultaneous catalytic removal of NOx and diesel soot particulates over La1−xCexNiO3 perovskite oxide catalysts
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DOI：
10.1016/j.catcom.2008.10.024
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发表时间：
2009-03
影响因子：
3.7
通讯作者：
Bin Zhao;Rijie Wang;Xiaoxia Yang
中科院分区：
文献类型：
--
作者：
Bin Zhao;Rijie Wang;Xiaoxia Yang
采用柠檬酸络合法制备了一系列La 1 − xCexNiO 3（0 <$x <$0.05）钙钛矿催化剂，用于同时脱除柴油机尾气中的氮氧化物和碳烟。采用X射线衍射、H2程序升温还原和X射线光电子能谱对催化剂进行了表征。通过程序升温反应考察了催化剂的催化性能。结果表明，Ni 2+是催化剂的活性中心。Ce部分取代La，提高了Ni ~（2+）的浓度，提高了催化剂的活性。La0.97Ce0.03NiO3催化剂的活性最高。最大N2产率为11.8%，着火温度为300°C。
A series of the La1−xCexNiO3(0⩽x⩽0.05) perovskite catalysts for simultaneous removal of nitrogen oxides and diesel soot were prepared by the citric acid complexation. The catalysts were characterized by X-ray diffraction, H2temperature programmed reduction and X-ray photoelectron spectroscopy. The catalytic performances of these catalysts were investigated by the temperature programmed reaction. The results indicated that Ni2+was the active centers. The partial substitution of Ce for La increased the concentration of Ni2+, enhancing the catalytic activities. The La0.97Ce0.03NiO3catalyst showed the highest activity. The maximum productivity of N2and the ignition temperature were 11.8% and 300°C, respectively.