期刊
APPLIED SURFACE SCIENCE
卷 314, 期 -, 页码 112-118出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.06.118
关键词
TiO2 rutile phase; SCR; Conduction band level; Superoxide ions
类别
资金
- Assembly Foundation of The Industry and Information Ministry of the People's Republic of China [543]
- National Natural Science Foundation of China [51078185]
- Scientific Research Project of Environmental Protection Department of Jiangsu Province [2013003, 201112]
- Industry-Academia Cooperation Innovation Fund Projects of Jiangsu Province [BY2012025]
- Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province [AE201001]
A series of V2O5/TiO2 catalysts with different ratios of TiO2 rutile phase was prepared. Focusing on the effect of TiO2 rutile phase on V2O3/TiO2 catalyst for the selective catalytic reduction (SCR) of NO with NH3, the NO conversion for the different catalysts was investigated. The experimental results showed that a small amount of TiO2 rutile phase could improve the NO conversion significantly below 270 degrees C. Analysis by XRD, NH3-TPD, UV-vis, EPR and DFT calculation showed that the rutile phase of TiO2 supporter decreased the band gap, especially, the conduction band level. It improved the formation of reduced V species and superoxide ions that were important to the low-temperature SCR reaction. (C) 2014 Elsevier B.V. All rights reserved.
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