Method for manufacture of noble metal alloy catalysts and catalysts prepared therewith

A supported ternary platinum-cobalt-gold alloy catalyst with the atomic ratio Pt:Co=3:1,

• wherein the crystallite size is less than 3 nm and the lattice constant is lower than 0.3870 nm (by XRD),
• and wherein gold (Au) is present in an amount of 0.1 to 5 wt.-% based on the total weight of the catalyst.

A supported ternary platinum-cobalt-palladium alloy catalyst with the atomic ratio Pt:Co=3:1,

• wherein the crystallite size is less than 3 nm and the lattice constant is lower than 0.3870 nm (by XRD),
• and wherein palladium (Pd) is present in an amount of 0.1 to 5 wt.-% based on the total weight of the catalyst.

A supported ternary platinum-cobalt-gold alloy catalyst according to claim 1, wherein the concentration of platinum, cobalt and gold on the support is in the range of 1 to 90 wt.-% based on the total weight of the catalyst.

A supported ternary platinum-cobalt-gold alloy catalyst according to claim 1, wherein the concentration of platinum, cobalt and gold on the support is in the range of 20 to 80 wt.-% based on the total weight of the catalyst.

A supported ternary platinum-cobalt-palladium alloy catalyst according to claim 2, wherein the concentration of platinum, cobalt and palladium on the support is in the range of 1 to 90 wt.-% based on the total weight of the catalyst.

A supported ternary platinum-cobalt-palladium alloy catalyst according to claim 2, wherein the concentration of platinum, cobalt and palladium on the support is in the range of 20 to 80 wt.-% based on the total weight of the catalyst.