The effect of Si/Al ratio and copper exchange level on isothermal kinetic rate oscillations for N2O decomposition over Cu-ZSM-5: a transient FTIR study

Bridging adsorption analytics and catalytic kinetics for metal-exchanged zeolites

“…The peak at 2156 cm -1 can be assigned to NO + associated with the Brønsted acid sites. 25 The 1653 cm -1 peak was not commonly observed in the previous spectroscopic studies of nitrogenous adsorbates on Cu-ZSM5. It could be associated with the νas(NO2) stretching vibration in dinitrogen trioxide species (e.g., Cu + -O2N=NO, with reported peak positions at 1644-1653 cm -1 ), 71,72 which has previously been suggested as a critical intermediate for partial reduction of NO to N2O on Cu monomers.…”

“…The Cu dimers in Cu-ZSM5 have been probed by using various spectroscopic techniques, including ultraviolet-visible spectroscopy (UV-Vis), [18][19][20] Fourier-transform infrared spectroscopy (FTIR), [20][21][22][23][24][25] resonance Raman spectroscopy (Raman), 26,27 electron paramagnetic resonance (EPR) [28][29][30] and XAS 21,[31][32][33] . Computational studies also support the formation of dicopper-oxo centers ([Cu-O-Cu] 2+ ) when NOx (NO 34,35 or N2O 36 ) interacts with Cu-ZSM5.…”

Activity of Cu-activated carbon fiber catalyst in wet oxidation of ammonia solution

“…As is seen in Fig. 3c, the monodentate nitrite or nitro group anions on the framework are associated with a peak at around 1490 cm −1 [22]. Fig.…”

Catalytic wet oxidation of ammonia solution: Activity of the nanoscale platinum–palladium–rhodium composite oxide catalyst

“…As illustrated in Fig. 3(b), the monodentate nitrite or nitro group anions on the framework are associated with a peak at about 1490 cm −1 for used catalysts [11,36]. As presented in Fig.…”