Enhancement of the OSC properties of Ce-Zr based solid solutions

An OIC/OS material, based upon 100 mole % material, comprising the reaction product of:

• up to about 95 mole % zirconium;
• up to about 50 mole % cerium;
• up to about 20 mole % of a stabilizer selected from the group consisting of yttrium, rare earths, and combinations comprising at least one of the stabilizers;
• and
• about 0.01 to about 25 mole % of a base metal selected from the group consisting of iron, copper, cobalt, nickel, silver, manganese, bismuth and mixtures comprising at least one of the foregoing metals.

A catalyst, comprising:

• an OIC/OS material having up to about 95 mole % zirconium, up to about 50 mole % cerium, up to about 20 mole % of a stabilizer selected from the group consisting of yttrium, rare earths, and combinations comprising at least one of the stabilizers, based upon 100 mole % of the material;
• and
• about 0.01 to about 25 mole % of a base metal selected from the group consisting of iron, copper, cobalt, nickel, silver, manganese, bismuth and mixtures comprising at least one of the foregoing metals;
• a noble metal;
• and
• a porous support;
• wherein the zirconium, cerium, metal, base metal, noble metal and porous support are deposited on a substrate.

A method for converting hydrocarbons, carbon monoxide and nitrogen oxides in an exhaust stream, comprising:

• using a catalyst comprising an OIC/OS material having up to about 95 mole % zirconium, up to about 50 mole % cerium, up to about 20 mole % of a stabilizer selected from the group consisting of yttrium, rare earths, and combinations comprising at least one of the stabilizers;
• and about 0.01 to about 25 mole % of a base metal selected from the group consisting of iron, copper, cobalt, nickel, silver, manganese, bismuth and mixtures comprising at least one of the foregoing metals, based upon 100 mole % of the material, a noble metal component, and a porous support, wherein the zirconium, cerium, metal, base metal, noble metal and porous support are deposited on a substrate;
• exposing the exhaust stream to the catalyst;
• and
• converting hydrocarbons, carbon monoxide and nitrogen oxides in the exhaust stream to nitrogen, water and carbon dioxide.