Patent ID: 8703636

Claim:
A method of manufacturing a catalyst body, the method comprising: combining a primary phase material with an inorganic binder, and optionally with an organic binder, to form a mixture, the primary phase material consisting of a zeolite and a CeO 2 —ZrO 2 , wherein the zeolite constitutes greater than 50 wt % of the primary phase material, and the CeO 2 —ZrO 2 is present with a Zr/Ce ratio of greater than 1.0; extruding the mixture into a honeycomb body; firing the honeycomb body for a first time and at a first furnace temperature sufficient to allow the inorganic binder to bind the primary phase material, wherein the honeycomb body is active for selective catalytic reduction of NO x after firing the honeycomb body for the first time and at the first temperature; impregnating at least part of the honeycomb body with a source of at least one reducing or oxidizing element; and widening an operating temperature window of the impregnated honeycomb body for reduction of NO x gas by heating the impregnated honeycomb body for a second time and at a second furnace temperature sufficient to form a redox oxide from the source, the redox oxide being supported by the honeycomb body.