Self-propagating High-temperature Synthesis of La_(1-x)Sr_xMn_yFe_(1-y)O_3 Perovskites for Soot Combustion Catalyst

T. Hirano; T. Tosho; T. Watanabe; T. Akiyama

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Self-propagating High-temperature Synthesis of La_(1-x)Sr_xMn_yFe_(1-y)O_3 Perovskites for Soot Combustion Catalyst

机译：烟灰燃烧催化剂La_（1-x）Sr_xMn_yFe_（1-y）O_3钙钛矿的自蔓延高温合成

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The La_(1-x)Sr_xMn_yFe_(1-y)O_3 samples of perovskite-type oxides were synthesized by Self-propagating High-temperature Synthesis (SHS) method. In this study, first, we synthesized B-site substituted perovskite-type oxides, LaMn_xFe_(1-x)O_3. The SHS method successfully synthesized LaMn_xFe_(1-x)O_3. The most active composition for soot combustion among synthesized samples of LaMn_xFe_(1-x)O_3 was x = 0.4, LaMn_(0.4)Fe_(0.6)O_3, from model-soot combustion experiment with TG/DTA analysis. We then examined the effect of A-site substitution by Sr on LaMn_(0.4)Fe_(0.6)O_3 per-ovskite. The SHS of La_(1-x)Sr_xMn_(0.4)Fe_(0.6)O_3 was successfully ignited, propagated and completed. XRD peaks of perovskite-type oxide phase was detected in all the synthesized La_(1-x)Sr_xMn_(0.4)Fe_(0.6)O_3 but unreacted material, SrCO_3, was also detected in the sample above x = 0.6 from XRD analysis. The soot combustion activity of Sr-doped LaMn_(0.4)Fe_(0.6)O_3 was not enhanced according to the impurity in the samples. The most active composition among synthesized samples of La_(1-x)Sr_xMn_yFe_(1-y)O_3 was LaMn_(0.4)Fe_(0.6)O_3 which exhibited lower activation energy than conventional Pt/Al_2O_3 catalyst, that is, LaMn_(0.4)Fe_(0.6)O_3 synthesized by SHS method had superior soot combustion activity despite its relatively small specific area.

机译：钙钛矿型氧化物的La_（1-x）Sr_xMn_yFe_（1-y）O_3样品是通过自蔓延高温合成（SHS）方法合成的。在这项研究中，首先，我们合成了B位取代的钙钛矿型氧化物LaMn_xFe_（1-x）O_3。 SHS方法成功合成了LaMn_xFe_（1-x）O_3。根据TG / DTA分析得出的模型烟ot燃烧实验，在LaMn_xFe_（1-x）O_3合成样品中，烟ot燃烧最活跃的成分为x = 0.4，LaMn_（0.4）Fe_（0.6）O_3。然后，我们研究了Sr对LaMn_（0.4）Fe_（0.6）O_3过钙钛矿的A-位取代的影响。 La_（1-x）Sr_xMn_（0.4）Fe_（0.6）O_3的SHS已成功点燃，传播并完成。在所有合成的La_（1-x）Sr_xMn_（0.4）Fe_（0.6）O_3中都检测到钙钛矿型氧化物相的XRD峰，但在X = 0.6以上的样品中，还通过XRD分析检测到了未反应的物质SrCO_3。掺Sr的LaMn_（0.4）Fe_（0.6）O_3的烟灰燃烧活性没有根据样品中的杂质而提高。 La_（1-x）Sr_xMn_yFe_（1-y）O_3的合成样品中活性最高的成分是LaMn_（0.4）Fe_（0.6）O_3，它的活化能比常规Pt / Al_2O_3催化剂低，即LaMn_（0.4）通过SHS法合成的Fe_（0.6）O_3尽管比表面积较小，但具有优良的烟so燃烧活性。

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来源
《High temperature materials and processes》 |2012年第5期|p.513-518|共6页
作者
T. Hirano; T. Tosho; T. Watanabe; T. Akiyama;
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作者单位

Graduate School of Engineering, Hokkaido University,Sapporo 060-8628, Japan;

Center for Advanced Research of Energy and Materials,Faculty of Engineering, Hokkaido University, Sapporo 060-8628,Japan;

Center for Advanced Research of Energy and Materials,Faculty of Engineering, Hokkaido University, Sapporo 060-8628,Japan;

Center for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类
关键词
self-propagating high-temperature synthesis; La_(1-x)Sr_xMn_yFe_(1-y)O_3; perovskite-type oxides; catalysts; soot combustion;

机译：自蔓延高温合成;La_（1-x）Sr_xMn_yFe_（1-y）O_3;钙钛矿型氧化物;催化剂;烟尘燃烧;

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Self-propagating High-temperature Synthesis of La_(1-x)Sr_xMn_yFe_(1-y)O_3 Perovskites for Soot Combustion Catalyst

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