Generation of multi-valence Cu _<i>x</i> O by reduction with activated semi-coke and their collaboration in the selective reduction of NO with NH₃.

After loading Cu x O, the surface areas of catalysts present an initial increase and then a decreasing trend in the range of 260–290 m 2 g −1 , among which Cu1.0 achieves the largest surface area (289.5 m 2 g −1 ).

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