Structural snapshots of the SCR reaction mechanism on Cu-SSZ-13

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Publisher: Royal Society of Chemistry

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Abstract
The structure of copper sites in Cu-SSZ-13 during NH3-SCR was unravelled by a combination of novel operando X-ray spectroscopic techniques. Strong adsorption of NH3 on Cu, its reaction with weakly adsorbed NO from the gas phase, and slow re-oxidation of Cu(I) were proven. Thereby the SCR reaction mechanism is significantly different to Fe-ZSM-5.