Abstract
In this paper, the CuO/Ce 0.8Zr 0.2O 2 catalysts were prepared for the catalytic reduction of NO by CO. The structure and the redox behavior of these catalysts were investigated by using XRD and H 2-TPR. Three peaks (α, β and γ) are observed when H 2 is used as reducing agent. The α peak is attributed to the dispersed copper oxide, the β peak is attributed to the moderate size bulk CuO and the γ peak is attributed to the large size bulk CuO. The Cu loading and calcination temperature have effects on the catalytic activity for NO–CO reaction and the N 2O selectivity. We conclude that the catalytic activity is related to the moderate size bulk CuO particles, and the N 2O selectivity is related to the large size bulk CuO particles. The dispersed copper oxide does not contribute to the catalytic activity and N 2O selectivity.
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