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- W2018969960 abstract "Three Fe-ZSM-5 catalysts (0.15–0.46 wt.% Fe) prepared via different routes with Fe ions present in extra-framework single sites as well as in oxidic clusters have been catalytically tested and monitored by operando EPR and UV–vis spectroscopy under standard and fast SCR conditions. In both cases, Fe ions in single α positions and oxidic clusters remain essentially trivalent while significant differences are evident for the remaining sites. During standard SCR, Fe sites in β positions are completely, and those in γ positions are partly reduced to inactive FeII, which is not able to catalyze the oxidative activation of NO being essential for its subsequent reduction to N2. During fast SCR, the same β and γ sites are effectively reoxidized by NO2 and are thus kept in a redox-active state. The high reaction rates in fast SCR already at low temperatures are therefore assigned to those sites." @default.
- W2018969960 created "2016-06-24" @default.
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- W2018969960 date "2014-07-01" @default.
- W2018969960 modified "2023-10-09" @default.
- W2018969960 title "Identifying active sites for fast NH3-SCR of NO/NO2 mixtures over Fe-ZSM-5 by operando EPR and UV–vis spectroscopy" @default.
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