Number of the records: 1
Role of active oxygen and NOx species in N2O decomposition over Fe-ferrierite
- 1.
SYSNO ASEP 0376640 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Role of active oxygen and NOx species in N2O decomposition over Fe-ferrierite Author(s) Sobalík, Zdeněk (UFCH-W) RID
Tabor, Edyta (UFCH-W) RID, ORCID
Nováková, Jana (UFCH-W) RID
Sathu, Naveen Kumar (UFCH-W)
Závěta, K. (CZ)Source Title Journal of Catalysis. - : Elsevier - ISSN 0021-9517
Roč. 289, MAY 2012 (2012), s. 164-170Number of pages 7 s. Language eng - English Country US - United States Keywords N2O decomposition ; iron ferrierite ; active oxygen Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects KAN100400702 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA203/09/1627 GA ČR - Czech Science Foundation (CSF) GAP106/11/0624 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000303788800017 DOI 10.1016/j.jcat.2012.02.007 Annotation Direct evidence for the formation of surface Fe–NOx species over iron ferrierites during decomposition of N2O was found with a combination of temperature-programmed desorption of adsorbed surface species and infrared and Mössbauer spectroscopies. Surface NOx species were produced via the conversion of a transiently formed Fe(III)–O by exposing iron ferrierites (Si/Al = 8.7, Fe/Al = 0.07–0.1) to N2O. The transformation of Fe(III)–O into Fe–NOx was time- and temperature- dependent. Below 280 °C, predominantly Fe(III)–O species were formed; these species are known to be highly active in oxidations at low temperatures. A transformation of Fe(III)–O into Fe–NOx species occurred when the reaction temperature was increased or when the reaction time was increased at low temperatures. This resulted in the disappearance of the oxidation activity of iron ferrierite. In contrast, the formation of Fe–NOx species enhanced the rate of N2O decomposition. Once formed, NOx species were stable during the subsequent N2O decomposition. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2013
Number of the records: 1