Manganese oxides with different crystalline structures: Facile hydrothermal synthesis and catalytic activities
Manganese oxides with different crystalline structures: Facile hydrothermal synthesis and catalytic activities
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DOI：
10.1016/j.matlet.2012.07.011
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发表时间：
2012-11-01
影响因子：
3
通讯作者：
Zheng, Yuying
中科院分区：
文献类型：
--
作者：
Sun, Ming;Lan, Bang;Zheng, Yuying
用水热法合成了不同晶型的α-、β-和γ-锰氧化物，并用X射线粉末衍射仪、比表面积分析仪、扫描电子显微镜、拉曼光谱、X射线光电子能谱和氢气程序升温还原(H-2-TPR)技术对其进行了表征。以二甲醚燃烧为探针反应，研究了锰氧化物的晶相效应。结果表明，与其他两种锰氧化物相比，纳米棒状的α-MnO2具有更高的催化活性。从比表面积、晶体结构和氧迁移率等方面讨论了它们对二甲醚燃烧的不同催化活性。(C)2012爱思唯尔B.V.保留所有权利。
Manganese oxides with different crystalline structures, namely alpha-, beta-, and gamma-, were synthesized by a facile hydrothermal method and characterized by X-ray powder diffraction (XRD), surface area analyzer, scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and hydrogen temperature-programmed reduction (H-2-TPR) techniques. The dimethyl ether combustion was used as a probe reaction to explore the crystalline phase effect of the manganese oxides. The results revealed that alpha-MnO2 with nanorod shape possesses higher catalytic activity compared to the other two manganese oxides. Their different catalytic activities for dimethyl ether combustion have also been discussed in terms of surface areas, crystalline structures and oxygen mobilities. (C) 2012 Elsevier B.V. All rights reserved.