Synthesis of PD particles by alcohols-assisted photoreduction for use in supported catalysts
View Patent ↗The present disclosure provides a novel synthesis method for palladium nanoparticles and palladium nanoparticles made using the method. The nanoparticles resulting from the method are highly reactive and, when deposited on a support, are highly suitable for use as catalytic material.
1. A method for forming palladium nanoparticles comprising:
commencing a reaction by combining palladium acetate with an alcohol under ambient temperature conditions wherein no polymer is present in the reaction;
allowing the reaction to progress until a black colloidal suspension is produced;
allowing palladium nanoparticles in the colloidal suspension to precipitate; and
collecting the palladium nanoparticles.
2. The method of claim 1 wherein the alcohol is methanol.
3. The method of claim 1 wherein the method takes place under ambient or UV light conditions.
4. The method of claim 1 wherein the step of combining the palladium acetate takes place in anhydrous conditions.
5. The method of claim 1 wherein the resulting nanoparticles have mean particle diameter of between 0.5 and 5 nm.
6. The method of claim 1 wherein the ambient temperature conditions are between 10° and 40° C.
7. The method of claim 1 wherein the ambient temperature conditions are between 15° and 35° C.
8. The method of claim 1 further comprising:
introducing a support into the colloidal suspension so that the collected palladium nanoparticles are supported.
9. The method of claim 8 wherein the support comprises carbon, carbide, oxide, or nitride.
10. The method of claim 1 wherein no surfactant is present in the reaction.
11. The method of claim 10 wherein no capping ligand is present in the reaction.
12. The method of claim 10 wherein no capping ligand is present in the reaction.
13. The method of claim 1 wherein the collected palladium nanoparticles are catalytically active.
14. A method for forming palladium nanoparticles comprising:
commencing a reaction by combining a palladium precursor with an alcohol under ambient temperature conditions wherein no polymer is present in the reaction;
allowing the reaction to progress until a black colloidal suspension is produced;
allowing palladium nanoparticles in the colloidal suspension to precipitate; and
collecting the palladium nanoparticles; wherein the nanoparticles having a mean particle diameter of between 0.5 and 5 nm.
15. The method of claim 14 wherein the alcohol is methanol.
16. The method of claim 14 wherein the method takes place under ambient or UV light conditions.
17. The method of claim 14 wherein the step of dissolving the palladium precursor takes place in anhydrous conditions.
18. The method of claim 14 further comprising:
introducing a support into the colloidal suspension so that the collected palladium nanoparticles are supported.
19. The method of claim 18 wherein the support comprises carbon, carbide, oxide, or nitride.
20. The method of claim 14 wherein the collected palladium nanoparticles are catalytically active.