Abstract: A process of doping zero-valance double metals into a cationic exchange resin to increase reactive activity of zero-valance metals includes providing a cationic exchange resin to contact a first metal in the form of ions to reduce the first metal which then attaches to the cationic exchange resin; providing a second metal in the form of ions to contact and attach to the first metal; and reducing the second metal to zero valance and forming a carrier containing double metals. The cationic exchange resin is selected from a strong acidic ion exchange resin of which the ion exchange functional group is SO3Na and SO3H. The first metal is selected from the noble metal group: palladium, platinum and copper. The second metal is selected from the normal metals group, such as tin. The first metal and the second metal respectively have particle diameters ranging from 20 to 100 nm.

Abstract: A process of doping zero-valance double metals into a cationic exchange resin to increase reactive activity of zero-valance metals includes providing a cationic exchange resin to contact a first metal in the form of ions to reduce the first metal which then attaches to the cationic exchange resin; providing a second metal in the form of ions to contact and attach to the first metal; and reducing the second metal to zero valance and forming a carrier containing double metals. The cationic exchange resin is selected from a strong acidic ion exchange resin of which the ion exchange functional group is SO3Na and SO3H. The first metal is selected from the noble metal group: palladium, platinum and copper. The second metal is selected from the normal metals group, such as tin. The first metal and the second metal respectively have particle diameters ranging from 20 to 100 nm.

Abstract: A method for spreading noble metal on an iron particle surface includes: providing a plurality of iron particles, cleaning the iron particles up and separating the iron particles from cleaning water, drying the iron particles, placing the iron particles into a heater oven with a reaction gas, heating the iron particles for oxidation reduction, placing the iron articles into a noble-metal-ion solution for immersion plating, processing the iron particles with a solid-and-liquid separation, and then drying the iron particles. Wherein the heating temperature of the heating oven ranges from 300 to 500 degrees centigrade and the duration thereof ranges from 3 to 5 hours. Whereby, the iron particles are activated first in order to react with the noble metal so that the activity and the uniformity of the noble metal attached to the iron surface is improved.