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Abstract

Catalyst compositions are provided that are useful in selectively removing carbon monoxide from a hydrogen-containing gas. These catalyst compositions preferably have the formula: nN/Ce.sub.1-(x+y+z) A.sub.x A'.sub.y A'.sub.z O.sub.2-.delta., where A, A', A' are independently selected from the group consisting of: Zr, Gd, La, Sc, Sr, Co, Cr, Fe, Mn, V, Ti, Cu and Ni; N is one or more members of the group consisting of: Pt, Pd, and Au; n is a weight percent between 0 and 25; x, y and z are independently 0 to 0.9; x+y+z is 0.1 to 0.9; and .delta. is a number which renders the composition charge neutral; or nN/(MO.sub.x).sub.y (CeO.sub.2-.delta.).sub.1-y, where M is one or more members of the group selected from: Zr, Co, Cr, Fe, Mn, V, Ti, Ni and Cu; N is one or more members of the group selected from: Pt, Pd, and Au; n is a weight percent between 0 and 25; y is 0.1 to 0.9; and x and .delta. make the compositions charge neutral.

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First Claim