| Autor: |
J. Soria, Zs. Koppány, Marcos Fernández-García, A. Fuerte, Zoltán Schay, Arturo Martínez-Arias, José C. Conesa, Ana B. Hungría, Ana Iglesias-Juez, James A. Anderson |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
Topics in Catalysis. :65-70 |
| ISSN: |
1022-5528 |
| DOI: |
10.1023/b:toca.0000029730.07300.cf |
| Popis: |
A study of the lean NO x reduction activity employing different reductants over Ag/Al2O3 samples prepared from reverse microemulsions or impregnation with EDTA-complexes is presented. A multitechnique approach is employed for characterisation of the samples and/or processes taking place in the course of the NOx-SCR reaction with propene and propane. Results by in situ-DRIFTS reveal that, for the propene reductant, silver provides a new path for hydrocarbon activation involving generation of adsorbed acrylate species as a partially oxidised active intermediate, in line with previous proposals for other non-noble metal systems. It is shown, mainly on the basis of XAFS studies, that active silver species are related to well dispersed silver aluminate-like phases with tetrahedral local symmetry and a relatively high disorder in the oxygen first shell. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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