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

Abstract

An environmentally benign Cu-Ce-Ti oxide catalyst exhibited excellent NH3-SCR activity, high N-2 selectivity and strong resistance against H2O and SO2 with a broad operation temperature window. The dual redox cycles (Cu2+ + Ce3+ <-> Cu+ + Ce4+, Cu2+ + Ti3+ <-> Cu+ + Ti4+) play key roles for the superior catalytic deNO(x) performance.