A Ce–Cu–Ti oxide catalyst for the selective catalytic reduction of NO with NH3

A Ce–Cu–Ti complex oxide catalyst for the selective catalytic reduction of NO with NH3 was prepared by coprecipitation method. XRD and H2–TPR reveal that the strong interaction between Ce and Cu results in the production of a new active oxygen species with high reducibility at low temperatures. Compared with Ce–Ti oxide catalyst, the Ce–Cu–Ti oxide catalyst produces better performance at the temperatures lower than 350 °C and higher SO2-resistent ability. H2O will reduce the SCR activity of Ce–Cu–Ti catalyst at low temperatures while promoting the catalyst performance at temperatures more than 350 °C.

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► The Ce–Cu–Ti oxide catalyst exhibits high activity in a wide temperature range.
► The Ce–Cu–Ti oxide catalyst performs better than Ce–Ti oxide at low temperatures.
► The Ce–Cu–Ti oxide catalyst has higher SO2 resistance than Ce–Ti oxide catalyst.
► H2O will promote the catalyst performance at the temperatures more than 350 °C.