【摘要】 以堇青石蜂窝陶瓷为载体,Ni（NO₃）₂·6H₂O、Mn（NO₃）₂为原料,通过柠檬酸法制得NiMnO-3钙钛矿催化剂,考察载体涂层对催化燃烧VOCs反应性能的影响,并采用X射线衍射仪（XRD）、扫描电镜（SEM）、比表面积分析仪（BET）、氢气程序升温还原（H₂-TPR）进行表征分析。实验结果表明:不同的涂层对负载型NiMnO₃钙钛矿催化剂的影响具有不同的效果。其中,Ce₀.75Zr₀.25O₂涂层有助于提高载体的比表面积,提供更多的活性位点,并且使负载型NiMnO₃钙钛矿催化剂的活性组分分散更加均匀,晶粒尺寸更小,提高了活性组分的高温稳定性。同时,Ce₀.75Zr₀.25O₂涂层与NiMnO₃钙钛矿之间具有的协调作用能提高反应的Redox循环速率,进而提高催化剂的催化性能。更多还原

【Abstract】 NiMnO₃ perovskite catalysts supported on cordierite honeycomb were synthesized by the citric acid method using Ni（NO₃）₂·6H₂O and Mn（NO₃）₂. The effect of the coating on the catalytic performance of VOCs in catalytic combustion was investigated. These catalysts were characterized by XRD,SEM,BET,and H₂-TPR. The results indicate that the different coating has different effects on the NiMnO₃ perovskite catalysts. The Ce₀.75Zr₀.25O₂ coating helps to improve carrier’s specific surface area and the active ingredient’s high temperature stability,and the load is more uniformly dispersed,while the grain size becomes smaller. At the same time,the synergistic effect between Ce₀.75Zr₀.25O₂ coating and NiMnO₃ perovskite catalysts can improve the Redox cycle rate of the reaction,and further improve the catalytic performance of the catalysts.更多还原