Improved mixed oxide compositions containing alumina

A suspension comprising:

• (i) a Platinum Group Metal selected from the group consisting of platinum, palladium, rhodium, iridium, ruthenium, and mixtures thereof and (ii) a mixed oxide composition comprising:
• a) about 3 to about 40 wt. % lanthanum on an oxide basis;
• b) about 50 to about 77 wt. % aluminum on an oxide basis;
• c) about 0.05 wt. % to about 15.00 wt. % iron on an oxide basis;
• d) about 0.02 wt. % to about 5.00 wt. % strontium on an oxide basis;
• e) optionally up to 99 wt. % of the lanthanum can be substituted with an optional rare earth selected from the group consisting of neodymium, yttrium, praseodymium, samarium, gadolinium, and mixtures thereof, wherein the total amount of lanthanum and optional rare earth are in an amount of about 3 to about 40 wt. % on an oxide basis;
• f) optionally up to 99 wt. % of the iron can be substituted with any transition metal (TM) dopant selected from the group consisting of manganese, chromium, cobalt, vanadium, copper, titanium, zinc and mixtures thereof, wherein the total amount of iron and the transition metal dopant when present are in an amount of about 0.05 to about 15.0 wt. % on an oxide basis;
• and
• g) optionally up to 99 wt. % of the strontium can be substituted with an alkaline earth (AE) metal dopant selected from the group consisting of magnesium, calcium and mixtures thereof, wherein the total amount of strontium and the alkaline earth metal dopant when present are in an amount of about 0.02 to about 5.00 wt. % on an oxide basis.