Preparation of La-Mn-O Perovskite Catalyst by Microwave Irradiation Method and its Application to Methane Combustion

Preparation of La-Mn-O Perovskite Catalyst by Microwave Irradiation Method and its Application to Methane Combustion
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微波辐射法制备La-Mn-O钙钛矿催化剂及其在甲烷燃烧中的应用

DOI:
10.1007/s10562-009-0034-8
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发表时间:
2010-01
期刊:
影响因子:
2.8
通讯作者:
--
中科院分区:
化学4区
文献类型:
--
作者:

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采用微波辐射工艺,仅需几分钟的热处理即可成功制备出La-Mn-O钙钛矿催化剂,并采用XRD、SEM、XPS、H2-TPR和O2-TPD等手段进行了表征。催化剂经微波辐照处理6 min后,主要为非化学计量的过量氧LaMnO 3. 15相,表现出优异的催化性能。与常规方法相比,该方法制备的样品具有较高的比表面积,Mn ~(4+)和氧空位含量增加,晶格氧的迁移率提高,这些都是甲烷燃烧的重要因素。
La-Mn-O perovskite catalyst was successfully prepared by microwave irradiation processing using only several minutes for heat treatment, and characterized by XRD, SEM, XPS, H2-TPR and O2-TPD. The catalyst by microwave irradiation processing with 6 min, mainly non-stoichiometric excess oxygen LaMnO3.15phase, shows excellent catalytic performance. Compared with the sample prepared by conventional method, it possesses relative higher surface area, the increase in Mn4+and oxygen vacancy content and the enhancement in the mobility of lattice oxygen which play an important part in the methane combustion.
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