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MnO(x)/TiO(2) composite nanoxides synthesized by deposition-precipitation method as a superior catalyst for NO oxidation.
- Source :
-
Journal of colloid and interface science [J Colloid Interface Sci] 2010 Dec 01; Vol. 352 (1), pp. 143-8. Date of Electronic Publication: 2010 Aug 13. - Publication Year :
- 2010
-
Abstract
- A series of MnO(x)/TiO(2) composite nanoxides were prepared by deposition-precipitation (DP) method, and the sample with the Mn/Ti ratio of 0.3 showed a superior activity for NO catalytic oxidation to NO(2). The maximum NO conversion over MnO(x)(0.3)/TiO(2)(DP) could reach 89% at 250°C with a GHSV of 25,000h(-1), which was much higher than that over the catalyst prepared by conventional wet-impregnation (WI) method (69% at 330°C). Characterization results including XRD, HRTEM, FTIR, XPS, H(2)-TPR, NO-TPD and Nitrogen adsorption-desorption implied that the higher activity of MnO(x)(0.3)/TiO(2)(DP) could be attributed to the enrichment of well-dispersed MnO(x) on the surface and the abundance of Mn(3+) species. Furthermore, DRIFT investigations and long-time running test indicated that NO(2) came from the decomposition of adsorbed nitrogen-containing species.<br /> (Copyright © 2010 Elsevier Inc. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1095-7103
- Volume :
- 352
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Journal of colloid and interface science
- Publication Type :
- Academic Journal
- Accession number :
- 20832076
- Full Text :
- https://doi.org/10.1016/j.jcis.2010.08.031