Patent ID: 7851398

Claim:
A process for preparing a catalyst material, the process comprising: (a) providing a first anatase titanium dioxide having a BET surface area greater than 15 m 2 /g and a hydrogen uptake for the reduction of Ti 4+ to Ti 3+ of from 5 to 20 μmol/m 2 ; (b) providing a second anatase titanium dioxide having a BET surface area less than or equal to 15 m 2 /g, which is different than the surface area of the first anatase titanium dioxide, and a hydrogen uptake for the reduction of Ti 4+ to Ti 3+ of from 0.6 to 7 μmol/m 2 ; and (c) admixing the first anatase titanium dioxide with the second anatase titanium dioxide to form a titanium dioxide mixture; wherein the hydrogen uptake of the first anatase titanium dioxide and the second anatase titanium dioxide are determined by measuring hydrogen consumption of an amount of a sample of each of the first anatase titanium dioxide and the second anatase titanium dioxide by gas chromatography and normalizing hydrogen consumption to the amount and surface area of each sample.