期刊
APPLIED SURFACE SCIENCE
卷 300, 期 -, 页码 58-65出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.02.002
关键词
NO oxidation; FeMnOx/TiO2; Loading sequences; Mechanisma
类别
资金
- National Natural Science Foundation of China [51278177]
- National High Technology Research and Development Program of China (863 Program) [2011AA060803]
- Scientific and Technological Major Special Project of Hunan Province in China [2010XK6003]
TiO2 with different iron and manganese oxides adding orders were prepared through isovolumetric impregnation and tested for catalytic oxidation of NO with O-2. It was found that the sampleobtained from one-step impregnation method had better catalytic activity. The excellent activity wasattributed to higher surface area, lower crystalline of manganese oxides, abundant Mn3+, Fe3+ and chemisorbed oxygen species on the surface. Furthermore, effects of loading sequences on FeMnOx/TiO2 catalysts were investigated. The study showed that Fe and Mn would affect each other and change thesurface physicochemical properties of FeMnOx/TiO2 when they were loaded step-by-step. In addition, the inhibiting effect of H2O on catalytic activity was reversible while the conversion of NO recoveredto 40% when SO2 was cut off. XPS analysis between used and fresh catalysts revealed the electrontransfer between Fen+ and Mnn+ ions in FeMnOx/TiO2. Possible reaction mechanism was put forward by comprehensive analysis of XPS and FT-IR results. (C) 2014 Elsevier B.V. All rights reserved.
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