期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 138, 期 -, 页码 253-259出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2013.02.030
关键词
CeO2-MnOx composite oxides; Oxygen vacancy; Synergistic effect; Benzene oxidation
资金
- National Natural Science Foundation for the Youth of China [51002037]
- Strategic pilot projects for science and technology of CAS [XDB05050000]
- National 863 Program [2010M064903]
A series of CeO2-MnOx composite oxides were synthesized through hydrothermal method and the complete catalytic oxidation of benzene were examined. The effects of the Ce-at/Mn-at atomic ratio on the features of catalyst structure and catalytic behavior were researched. The results exhibited that the catalytic properties of CeO2-MnOx composite oxides were higher than pure CeO2 or MnOx. When the Ceat/Mnat ratio was 3:7, the catalytic activity reached the best. By means of testing, the data revealed that the synergistic effects existed in the composite oxides, which resulted in the enhancement of catalytic abilities. In the main phase, MnOx provided available oxygen species and CeO2 enhanced oxygen mobility. In addition, the nature of oxygen vacancy of catalysts was also studied through positron annihilation spectrum. The results showed that the concentration of oxygen vacancy for CeO2-MnOx composite oxides changed comparing with pure CeO2 or MnOx, which also caused the activity differences over benzene. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据