期刊
CATALYSIS COMMUNICATIONS
卷 8, 期 12, 页码 1896-1900出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2007.03.007
关键词
De-NOx; selective catalytic reduction; precursor; MnOx/TiO2; low-temperature
TiO2-supported manganese oxide catalysts were prepared from two different precursors, manganese nitrate (MN) and manganese acetate (MA), and these samples were characterized by BET, XRD, TG/DTA, XPS and FT-IR. The characterization results showed that the MN precursor resulted primarily in MnO2, accompanied with some Mn-nitrate, while the MA precursor caused mainly Mn2O3 species. These two different precursors also led to different surface Mn atom concentrations indicated by XPS and NH3 adsorption. Consequently, the higher low-temperature activity of MnOx/TiO2 from MA precursor was attributed to higher surface Mn concentration and the surface Mn2O3 species. (c) 2007 Elsevier B.V. All rights reserved.
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