Niobium containing zirconium-cerium based solid solutions

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

• about 50 to about 85 mole % zirconium;
• about 10 to about 30 mole % cerium;
• about 2 to about 11 mole % R, and
• about 2 to about 11 mole % niobium.

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

• about 0.5 to about 95 mole percent (mole %) zirconium;
• about 0.5 to about 40 mole % cerium;
• about 0.5 to about 15 mole % R, wherein R is a rare earth metal alkaline earth metal, of a combination comprising at least one of the foregoing;
• about 0.5 to about 15 mole % niobium;
• and
• a precious metal, wherein the precious metal is platinum, palladium, iridium, osmium, rhodium, ruthenium, or a mixture comprising one or more of the foregoing precious metals.

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

• about 0.5 to about 95 mole percent (mole %) zirconium;
• about 0.5 to about 40 mole % cerium;
• about 0.5 to about 15 mole % R, wherein R is a rare earth metal, alkaline earth metal or a combination comprising at least one of the foregoing;
• about 0.5 to about 15 mole % niobium;
• and
• a support, wherein the support comprises a high surface area alumina.

An OIC/OS material, based upon 100 mole % metal component in the material, comprising:

• about 0.5 to about 95 mole percent (mole %) zirconium;
• about 0.5 to about 40 mole % cerium;
• about 0.5 to about 15 mole % yttrium;
• and
• about 0.5 to about 15 mole % niobium.