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利用“超声膜扩散法”制备了系列Ba掺杂的CeO_2-ZrO_2固溶体,研究了Ba掺杂对CeO_2-ZrO_2固溶体的热稳定性和储放氧能力的影响,并测量了Ba掺杂CeO_2-ZrO_2固溶体材料的储存NOx性能。结果表明,随着Ba含量的增加,固溶体的储氧量先增加后降低,在Ce_(0.5)Zr_(0.5)O_2·xBaO系列固溶体中,当x=0.16时,样品储氧量达到最大,新鲜样品的储氧量可达到745 μmol·g~(-1),样品的NO储量随含Ba量的增加而线性增加。
A series of Ba-doped CeO_2-ZrO_2 solid solutions were prepared by using “ultrasonic film diffusion method”. The effects of Ba doping on the thermal stability and oxygen storage and storage capacity of CeO_2-ZrO_2 solid solutions were investigated. The effects of Ba doping CeO_2 Storage NOx Performance of ZrO_2 Solid Solution Materials. The results show that with the increase of Ba content, the oxygen storage capacity of the solid solution first increases and then decreases. In the Ce 0.5 Zr 0.5 O 2 .xBaO solid solution, when x = 0.16, the oxygen storage capacity reaches the maximum. The oxygen storage capacity of the sample can reach 745 μmol · g -1, and the NO content of the sample increases linearly with the increase of Ba content.