Catalytic oxidation of toluene over nanorod-structured Mn-Ce mixed oxides
Catalytic oxidation of toluene over nanorod-structured Mn-Ce mixed oxides
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纳米棒结构Mn-Ce混合氧化物催化氧化甲苯
DOI：
10.1016/j.cattod.2013.06.017
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发表时间：
2013-11-01
期刊：
影响因子：
5.3
通讯作者：
Ye, Daiqi
中科院分区：
文献类型：
--
作者：
Liao, Yinnian;Fu, Mingli;Ye, Daiqi
成功地合成了不同Mn含量的纳米棒状MnCe复合氧化物。采用SEM、TEM、HRTEM、EDX、XRD、BET、XPS、拉曼、O-2-TPD和H-2-TPR等手段对材料进行了表征。Mn含量高的MnCe复合氧化物纳米棒表现出最好的催化活性和高稳定性。锰和铈氧化物之间形成的固溶体，产生更多的Mn 4+和氧空位，是维持高活性和稳定性的关键，涉及诱导的移动的晶格氧的参与。因此，通过掺杂活性组分，可以进一步提高具有一定形貌的单一金属氧化物的催化活性，形成尽管比表面积较低但形状不变的混合氧化物。(c)2013爱思唯尔有限公司版权所有。
Nanorod-structured MnCe mixed oxides with various content of Mn were synthesized successfully. The resulting materials were characterized by SEM, TEM, HRTEM, EDX, XRD, BET, XPS, Raman, O-2-TPD and H-2-TPR. MnCe mixed oxides nanorods with high content of Mn displayed the best catalytic activity and high stability. The formation of the solid solution between manganese and cerium oxides, giving rise to more Mn4+ and oxygen vacancies, was crucial in maintaining the high activity and stability, involving the participation of the induced mobile lattice oxygen. Thus, the catalytic activity of the single metal oxide with certain morphology could be further enhanced by doping the active component to form the mixed oxides that kept with the unchanged shape, despite of their lower surface area. (c) 2013 Elsevier B.V. All rights reserved.