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Promotive effect of Nb2O5 on the catalytic activity of Ir/SiO2 for NO reduction with CO under oxygen-rich conditions
- Source :
-
Catalysis Communications . Jun2007, Vol. 8 Issue 6, p885-888. 4p. - Publication Year :
- 2007
-
Abstract
- Abstract: The addition of Nb2O5 was found to promote considerably the catalytic activity of Ir/SiO2 for the selective reduction of NO with CO under excess O2- and SO2-free conditions. Improvement of durability against oxidation of Ir metal by Nb2O5 addition is the main reason for the activity enhancement. Adding Nb2O5 to Ir/SiO2 (Nb2O5/Ir/SiO2) was more effective than using Nb2O5/SiO2 support for Ir (Ir/Nb2O5/SiO2). The excellent activity of Nb2O5/Ir/SiO2 can be attributed to the strong interaction of Ir with Nb2O5 as well as high Ir dispersion. [Copyright &y& Elsevier]
- Subjects :
- *OXIDATION
*CARBON monoxide
*PLATINUM group catalysts
*SILICON compounds
Subjects
Details
- Language :
- English
- ISSN :
- 15667367
- Volume :
- 8
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Catalysis Communications
- Publication Type :
- Academic Journal
- Accession number :
- 24710630
- Full Text :
- https://doi.org/10.1016/j.catcom.2006.09.004