Patent ID: 7381683

Claim:
A method of producing a supported platinum-palladium catalyst, comprising the steps of: contacting a quantity of alumina support material with a volume of water for a first time period to form a liquid mixture, wherein said volume of water is greater than two times a pore volume of said quantity of alumina support material; adding a platinum salt solution having a molar concentration of 0.0001 to 0.1 and a palladium salt solution having a molar concentration of 0.0001 to 0.1 to said liquid mixture following said first time period and stirring said liquid mixture for a second time period; adding a reducing agent to said liquid mixture following said second time period and stirring said liquid mixture for a third time period; separating out said quantity of alumina support material with platinum particles and palladium particles supported thereon from the liquid mixture; and drying said quantity of alumina support material with platinum particles and palladium particles supported thereon, wherein said platinum salt is reduced to platinum particles within said liquid mixture during said third time period, and said palladium salt is reduced to palladium particles within pores of said quantity of alumina support material within said liquid mixture during said third time period.