Abstract: The present disclosures provides a catalyst composition comprising a mixed oxide support material and a platinum group metal supported on the mixed oxide support material, the mixed oxide support material comprising a solid solution mixed oxide having the formula CewZrxSnyMzOa, wherein: 0.05?w?0.90; 0.05?x?0.90; 0.001?y?0.25; 0.001?z?0.60; w+x+y+z=1.00; 1.0?a?2.0; and M is an element selected from one or more of sodium, potassium, rubidium, caesium, magnesium, calcium, strontium, barium, scandium, yttrium, titanium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, technetium, rhenium, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, copper, silver, gold, zinc, aluminium, gallium, thallium, silicon, germanium, lead, bismuth, lanthanum, praseodymium, neodymium, samarium, europium, gadolinium, terbium, erbium, lutetium, dysprosium, holmium, thulium and ytterbium.

Abstract: A method of manufacturing a catalyst intermediate is provided. The method comprises: providing a slurry comprising a hydrous oxide of one or more of aluminium, cerium and zirconium; and contacting the slurry comprising a hydrous oxide with platinum group metal (PGM) ions to provide a PGM-containing slurry.