Abstract: Disclosed herein are compositions having enhanced oxygen storage capacity (OSC). The OSC enhanced compositions contain cerium, zirconium, lanthanum, and neodymium, and a dopant element selected from the group consisting of Ti, Mn, Fe, Co, Cu, Zn, Ga, Ge, Ta, W, Mo, Nb, In, Sn, Ba, and mixtures thereof. In certain embodiments, these compositions contain two dopants. In certain embodiments of these compositions, the compositions comprising cerium, zirconium, lanthanum, and neodymium and one or more dopant elements have an OSC after aging at 1000° C. for 10 hours which is improved by 1 to 50%, compared to an undoped composition comprising cerium, zirconium, lanthanum, and neodymium. Aging can be conducted in an air environment. Further disclosed are processes of producing these compositions having enhanced oxygen storage capacity (OSC). The compositions can be used as a catalyst.

Abstract: Disclosed herein are mixed oxide compositions comprising zirconium and cerium having a surprisingly small particle sizes. The compositions disclosed herein contain zirconium, cerium, optionally yttrium, and optionally one or more other rare earths other than cerium and yttrium. The compositions exhibit a particle size characterized by a D90 value of about 5 um to about 25 ?m and a D99 value of about 5 ?m to about 50 ?m. Further disclosed are processes of producing these compositions using oxalic acid and an alcohol and heating in the process. The compositions can be used as a catalyst and/or part of an automobile exhaust system.

Abstract: Disclosed herein are compositions containing zirconium and cerium having a surprisingly small particle size. The compositions disclosed herein contain zirconium, cerium, optionally yttrium, and optionally one or more other rare earth oxides other than cerium and yttrium. The compositions exhibit a particle size characterized by a D90 value of about 5 ?m to about 30 ?m and a D99 value of about 5 um to about 40 um. Further disclosed are processes of producing these compositions using oxalic acid and supercritical drying in the process. The compositions can be used as a catalyst and/or part of a catalytic system. The composition is prepared by co-precipitation using oxalic acid and supercritical drying.

Abstract: Disclosed herein are compositions comprising zirconium and cerium having a surprisingly small particle sizes. The compositions disclosed herein contain zirconium, cerium, optionally yttrium, and optionally one or more rare earths other than cerium and yttrium The compositions exhibit a particle size characterized by a Dso value of about 20 ?m to about 45 ?m and a D99 value of about 55 ?m to about 1 00 ?m. Further disclosed are processes of producing these compositions using oxalic acid in the process. The compositions can be used as a catalyst and/or part of a catalytic system for automobile exhaust gas.