Patent ID: 7563746

Claim:
A composition, comprising: a composite comprising a Type II aluminum oxide component matrix having pore size of 120 Å to 1000 Å in diameter; and about 5 wt % to about 70 wt % Type II oxygen storage crystallite component, based upon a total weight of the composite, wherein the oxygen storage crystallite component comprises clusters of primary oxygen storage particles having a particle size, measured along a major axis, of about 50 Å to about 100 Å; said clusters being porous with a pore size of 120 Å to 1000 Å in diameter; wherein the clusters comprise about 5 to about 500 primary oxygen storage particles, and wherein the clusters are dispersed within the aluminum oxide component matrix; said composition having been made by a method comprising: combining a Type II aluminum hydroxide gel with a Type II oxygen storage gel prior to any calcination to form a combined gel; and spray drying the combined gel to form a dried composite.