Applied Catalysis B: Environmental, Vol.125, 492-498, 2012
Catalytic decomposition of N2O over CuxCe1-xOy mixed oxides
The catalytic N2O decomposition was investigated over a series of CuxCe1-xOy mixed oxides with different Cu/Ce molar ratios. Effects of synergy over mixed oxides of CeO2 and CuO were observed significantly, the catalyst of Cu0.67Ce0.33Oy exhibited the high activity among the Cu-Ce-O mixed oxides for N2O decomposition. Characterizations of XRD, N-2-adsorption, XPS, and H-2-TPR were applied to correlate their properties with the corresponding catalytic performance, and reveal the synergetic effect between CuO and CeO2 for N2O decomposition. In situ DRIFTS investigation confirmed the presence of Cu-I species that was closely related with the activity of CuxCe1-xOy catalyst. The synergy of CuxCe1-xOy promoted the stability and the ability to regenerate the active Cu-I site. (C) 2012 Elsevier B.V. All rights reserved.