Abstract
A series of MoO3-doped CeO2–ZrO2 catalysts were investigated for the selective catalytic reduction of NOx by NH3 (NH3-SCR). It was found that the added MoO3 significantly enhanced the activity of CeO2–ZrO2 catalyst for NH3-SCR of NOx in a wide temperature range and the optimum MoO3 loading is 5%. The highly dispersed MoO3 not only resulted in more Lewis acid and Brønsted acid sites formed on the catalyst surface, but also increased the redox property of the catalyst, all of which account for the enhanced SCR activity.
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