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Improvement of Gold to Reducibility of La-Ce-Mn Catalyst under Lean Combustion

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【作者】 翁端； 徐鲁华； 吴晓东； 沈美庆；

【Author】 Weng Duan 1* , Xu Luhua 1, Wu Xiaodong 1, Shen Meiqing 2 (1. Department of Material Science & Engineering, Tsinghua University, Beijing 100084, China; 2. School of Chemistry Engineering University, Tianjing 300072, China)

【机构】 Department of Material Science & Engineering； Tsinghua University； School of Chemistry Engineering University Beijing 100084； China； Beijing 100084； Tianjing 300072； China；

【Abstract】 The effect of Au on the reducibility of La Ce Mn catalyst was studied in the synthetic exhaust gas mixture containing 10% oxygen. The characteristics of samples were analyzed by BET, SEM, XRD and activity evaluation. The results show that, in lean combustion, the performance of perovskite type catalysts is evidently enhanced through adding Au, and specially a satisfying reducibility for NO x is demonstrated between 300～500 ℃. The catalytic activity of samples increases with the loading amount of Au, and the maximum conversion rate for NO x decomposition reaches up to 47% in 360～400 ℃. Moreover, the dispersivity and uniformity of the surface distribution of perovskite with Au have an important influence on the catalytic activity.

【关键词】 catalyts； additive gold； perovskite La Ce Mn； reducibility； surface analysis； rare earths；
【Key words】 catalyts； additive gold； perovskite La Ce Mn； reducibility； surface analysis； rare earths；
【基金】 ProjectsupportedbyAcademicTeacherSustentationFundofMinistryofEducationofChina (2 0 0 0～ 2 0 0 1)
  • 【文献出处】 Journal of Rare Earths ,稀土学报(英文版) , 编辑部邮箱 ,2003年02期
  • 【分类号】O643.3
  • 【下载频次】50
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