- Pt nanoparticles are firstly synthesized, and then the particles should be deposited on the carbon support.
- In my previous search for appropriate papers, Pt nanoparticles (suspended in water) can be deposited on the Vulcan XC in ethylene glycol (EG) as a solvent without any treatment (i.e., heating, adding some chemicals etc.), but stirring. It has been known that the EG possess amphiphilic property so as to act as a linker between carbon support and Pt nanoparticles.
- By following the above process, I could not obtain the desired sample. By measuring the CV in HClO4, the resulting material only exhibited EDLC. We expected that the shape of CV exhibit the current peaks for PtO reduction and H+ sorption.
- Thus, we think the Pt nanoparticles were not successfully deposited on the carbon support. What should I have to do for successful fabrication?
Instead of choosing EG try with some other low viscous solvents. For example try acetonitrile.
The procedure explained for Pd in the attached file (incipient wetness method) can be used for depositing Pt at the surface of carbon by using H2PtCl6 instead of H2PdCl4. Give it a try.
Alain
If u synthesized the well-cleaned Pt nano-particles using the wet chemical methods then prepare a weighted carbon black slurry (depends on the Pt % you want in the carbon) by adding DI water and Vulcan carbon. Sonicate this mixture until complete dispersion happens at least for 20-30 mins. Now to this slurry add Pt nano particles, again sonicate for 30 mins. Keep this mixture for stirring over night. After that keep the mixture for drying.
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