A superior catalyst with dual redox cycles for the selective reduction of NO_x by ammonia

摘要

An environmentally benign Cu-Ce-Ti oxide catalyst exhibited excellent NH_3-SCR activity, high N_2 selectivity and strong resistance against H_2O and SO_2 with a broad operation temperature window. The dual redox cycles (Cu~(2+) + Ce~(3+)←→ Cu~+ + Ce~(4+), Cu~(2+) + Ti~(3+)←→ Cu~+ + Ti~(4+)) play key roles for the superior catalytic deNO_x performance.