摘要
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。
Different Ce0.5Zr0.5O2 · xBaO solid solutions were prepared by ultrasound-assisted membrane reaction（UAMR） and characterized by XRD, BET, O2-TPD and NO-TPD. The oxygen and NO storage capability of the Ce0.5Zr0.5O2 · xBaO solid solutions was investigated. The results showed that the oxygen storage capability of the samples increased first and then declined with Ba loadings. Maximum oxygen storage capacity of 745 μmol · g^-1 was obtained over fresh Ce0.5Zr0.5O2 · 0. 16BaO solid solution calcined at 550 ℃. The NO storage capability increased linearly with Ba loadings.
出处
《工业催化》
CAS
2009年第2期65-69,共5页
Industrial Catalysis
基金
国家高技术研究发展计划(863计划)基金项目(2006AA06Z347)
北京市自然科学基金重点项目(06C0002)
北京市属市管高等学校学术创新团队项目
关键词
催化剂工程
铈锆固熔体
钡掺杂
储氧材料
catalyst engineering
CeO2-ZrO2 solid solution
Ba doping
oxygen storage material
