Complex reduction method for preparing highly alloyed Pt-based compound metal nato catalyst
A nano-catalyst and composite metal technology, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Satisfactory, reducing the catalytic performance of the catalyst, reducing the surface area of the platinum-based alloy, etc., to achieve excellent electrocatalytic performance, improved electrocatalytic oxidation performance, and the effect of increasing the degree of alloying
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[0028] Example 1:
[0029] 1. Weigh 60mg of Cabot's Vulcan XC-72R activated carbon powder and add 1.32ml 0.0386mol / L H 2 PtCl 6 Solution and 0.52ml 0.09635mol / L RuCl 3 , Then add a mixed solution of tetrahydrofuran and water, stir at high speed for 20 hours to make the mixture uniform.
[0030] 2. At 10℃, slowly add excess reducing agent solution (NaBH 4 ), mechanically stirring for 1 hour to completely react the metal salt with the reducing agent.
[0031] 3. After drying to remove the solvent, wash with water and alcohol several times in sequence, and check with silver nitrate solution until there is no chloride ion in the eluate. Dry at 60°C under air conditions to obtain a Pt-Ru / C catalyst, wherein the catalyst particle size is about 1.5-3.5 nm.
[0032] The XRD pattern of the self-made PtRu / C catalyst with a metal loading of 20% and a PtRu atomic ratio of 1:1.
[0033] figure 1 It shows that the catalyst has a relatively high degree of alloying. In the alloy, the atomic frac...
Example Embodiment
[0036] Example 2:
[0037] 1. Weigh 60mg of self-made carbon nanotubes with a diameter of 10-20nm and add 1.32ml 0.0386mol / LH 2 PtCl 6 Solution and 0.52ml0.09635mol / L RuCl 3 , Then add a mixed solution of tetrahydrofuran, water and ethanol, and stir at high speed for 20 hours to make the mixture uniform.
[0038] 2. At 60°C, slowly add excess reducing agent solution (HCOONa), and mechanically stir for 4 hours to completely react the metal salt with the reducing agent.
[0039] 3. After drying to remove the solvent, wash with water and alcohol several times in sequence, and check with silver nitrate solution until there is no chloride ion in the eluate. Dry at 60°C under air conditions to prepare Pt-Ru / CNTs catalyst, wherein the catalyst particle size is about 1.5-3.5nm.
Example Embodiment
[0040] Example 3:
[0041] 1. Weigh 60mg of Cabot's Vulcan XC-72R activated carbon powder and add 1.32ml0.0386mol / L H 2 PtCl 6 Solution and 0.52ml0.09635mol / L OsCl 3 , Then add the mixed solution of 1,4-dioxane and water, and stir at high speed for 20 hours to make the mixture uniform.
[0042] 2. At 80℃, slowly add excess reducing agent solution (Na 2 S 2 O 4 ), mechanically stirring for 1 hour to completely react the metal salt with the reducing agent.
[0043] 3. After drying to remove the solvent, wash with water and alcohol several times in sequence, and check with silver nitrate solution until there is no chloride ion in the eluate. After drying at 60°C under vacuum, a Pt-Os / C catalyst is prepared, wherein the catalyst particle size is about 1.5-3.5nm.
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