A kind of synthetic method of supported ternary platinum alloy catalyst
A synthesis method and ternary alloy technology, applied in electrical components, battery electrodes, circuits, etc., to achieve the effect of improving methanol oxidation performance, improving oxygen reduction performance, and good repeatability
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Embodiment 1
[0026] Weigh 100mg CuSO 4 ·5H 2 O, add a few drops of water to dissolve, then add 75mg Vulcan XC-72 carbon spheres and 120mL ethylene glycol, and ultrasonically disperse for 60min. Then add 300mg NaBH rapidly 4 powder, stirred overnight at room temperature. NaBH 4 After complete decomposition, slowly add 2.4 mL of 19.5 mmol / L HAuCl to the above solution at a rate of 0.5 mL / min using a peristaltic pump 4 , and continued stirring for 5 h after ultrasonication for 30 min. HAuCl 4 A substitution reaction occurs with Cu, and the generated Au nanoparticles cover the Cu surface, and the Cu 2+ diffuse into the solution. Since the amount of Au is relatively small, it cannot completely cover the surface of Cu nanoparticles, so the surface of Cu has enough space to accommodate other atoms. In order to further obtain the PtAuCu ternary material, we continued to add 4.8mL 19.5mM K 2 PtCl 4 solution. After the reaction, it was centrifuged, washed, and dried at room temperature. ...
Embodiment 2
[0033] Weigh 100mg CuSO 4 ·5H 2 O, add a few drops of water to dissolve, then add 75mg Vulcan XC-72 carbon spheres and 120mL ethylene glycol, and ultrasonically disperse for 60min. Then add 300mg NaBH rapidly 4 powder, stirred overnight at room temperature. NaBH 4 After complete decomposition, slowly add 1 mL of 19.5 mmol / L HAuCl to the above solution at a rate of 0.5 mL / min using a peristaltic pump 4 , and continued stirring for 5 h after ultrasonication for 30 min. Using the same method, continue to drop 7mL 19.5mM K 2 PtCl 4 solution. After the reaction, it was centrifuged, washed, and dried at room temperature. Finally, the above materials were placed in H 2 / Ar atmosphere, calcination at 300°C for 30min to obtain Pt supported on carbon spheres 10 Au 3 Cu 46 Ternary alloy.
Embodiment 3
[0035] Weigh 100mg CuSO 4 ·5H 2 O, add a few drops of water to dissolve, then add 75mg of polypyrrole nanotubes and 120mL of ethylene glycol, and ultrasonically disperse for 60min. Then add 300mg NaBH rapidly 4 powder, stirred overnight at room temperature. NaBH 4 After complete decomposition, use a peristaltic pump to slowly add 2.4mL 19.5mmol / L HAuCl to the above solution at a rate of 0.5mL / min 4 , and continued stirring for 5 h after ultrasonication for 30 min. Using the same method to continue to drop 4.8mL 19.5mM K 2 PtCl 4solution. After the reaction, it was centrifuged, washed, and dried at room temperature. Finally, the above materials were placed in H 2 / Ar atmosphere, calcined at 300°C for 30 min to obtain a PtAuCu ternary alloy supported by carbon spheres.
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