Structural characterization of iron species in Fe-ZSM-5 catalysts and the elucidation of their role in the mechanism of NOx reactions Pérez Vélez, Roxana , 1985- Text theses Text Hochschulschrift 2014 2014 eng electronic resourceremoteComputermedienOnline-Ressourcetext/htmlapplication/pdfOnline-Ressource graph. Darst. The selective catalytic reduction of NOx by ammonia (NH3-SCR) has widely applied in the abatement of NOx. Fe-ZSM-5 is a potential catalyst, showing high performance in standard SCR (mainly NO) at > 400°C and in fast SCR (NO/NO2 = 1) at ≥ 250°C. The identification of the active species in Fe-ZSM-5 catalysts and reaction mechanism for SCR reactions were investigated by in situ and operando EPR, UV-Vis and FTIR spectroscopy. The spectroscopic studies demonstrate the role of NO2 to reoxidize isolated Fe(II) to the active Fe(III) at β and γ sites, and attribute them the higher activity in fast SCR. vorgelegt von : Roxana Pérez Vélez Rostock, Univ., Mathematisch-Naturwiss. Fak., Diss., 2015 628.532 624 333.7 35.10 http://rosdok.uni-rostock.de/resolve?urn=urn:nbn:de:gbv:28-diss2015-0041-9 http://rosdok.uni-rostock.de/resolve?urn=urn:nbn:de:gbv:28-diss2015-0041-9&pdf http://nbn-resolving.de/urn:nbn:de:gbv:28-diss2015-0041-9 Structural characterization of iron species in Fe-ZSM-5 catalysts and the elucidation of their role in the mechanism of NOx reactions--(DE-627)816638292 urn:nbn:de:gbv:28-diss2015-0041-9 oclc: 935810072 ppn: (DE-627)818337222