Skip to main content

Selective formation of tetrahedral Pt nanocrystals from K2PtCl6/PVP

Chinese Science Bulletin volume 48, pages 2589–2593 (2003)Cite this article

Abstract

Tetrahedral platinum (Pt) nanocrystals (3–8 nm) are synthesized in high selectivity (ca. 80%) from hydrogen reduction of aqueous K2PtCl6 by using polyvinylpyrrolidone (PVP: M w≈360000) as a protector. Morphology (TEM) measurements of the metal colloids and UV-Vis absorption of the colloidal solution are employed to monitor the tetrahedron formation during the syntheses with varying K2PtCl6/PVP ratios. The results clearly show a two-stage process for the selective formation of tetrahedral nanocrystals. Rapid nucleation and crystal formation at the early stage result in round-like crystallites and the external facet evolution in thereafter slow crystal growth leads selectively to the formation of the tetrahedrons.

This is a preview of subscription content, access via your institution.

Access options

Buy single article

Instant access to the full article PDF.

USD 39.95

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

References

  1. Kubo, R., Electronic properties of metallic fine particles, J. Phys. Soc. Japan, 1962, 17(6): 975–986.

    Article  Google Scholar 

  2. Kreibig, U., Vollmer, M., Optical Properties of Metal Clusters (ed. J. P. Toennies), Berlin: Springer-Verlag, 1995. 1–12.

    Google Scholar 

  3. Ahmadi, T. S., Wang, Z. L., Green, T. C. et al., Shape-controlled synthesis of colloidal platinum nanoparticles, Science, 1996, 272(5270): 1924–1926.

    Article  Google Scholar 

  4. Balint, I., Miyazaki, A., Aika, K. A., NO reduction by CH4 over well-structured Pt nanocrystals supported on gamma-Al2O3, Appl. Catal. B, 2002, 37(3): 217–229.

    Article  Google Scholar 

  5. Lyuksyutov, I., Naumovets, A. G., Pokrovsky, V., Two-Dimensional Crystal, Boston: Academic, 1992. 349–379.

    Google Scholar 

  6. Petroski, J. M., Wang, Z. L., Green, T. C. et al., Kinetically controlled growth and shape formation mechanism of platinum nanoparticles, J. Phys. Chem. B, 1998, 102(32): 3316–3320.

    Article  Google Scholar 

  7. Teranishi, T., Kurita, R., Miyake, R. M., Shape control of Pt nanoparticles, J. Inorg. Organometall. Polym., 2000, 10(3): 145–156.

    Article  Google Scholar 

  8. Devi, G. S., Rao, V. J., Room temperature synthesis of colloidal platinum nanoparticles. Bull. Mater. Sci., 2000, 23(6): 467–470.

    Article  Google Scholar 

  9. Kónya, Z., Puntes, V. F., Kiricsi, I. et al., Novel two-step synthesis of controlled size and shape platinum nanoparticles encapsulated in mesoporous silica, Catal. Lett., 2002, 81(3–4): 137–140.

    Article  Google Scholar 

  10. Miyazaki, A., Nakano, Y., Morphology of Platinum nanoparticles protected by poly(N-isopropylacrylamide), Langmuir, 2000, 16(18): 7109–7111.

    Article  Google Scholar 

  11. Fu, X., Wang, Y., Wu, N. et al., Shape-selective preparation and properties of oxalate-stabilized Pt colloid, Langmuir, 2002, 18(12): 4619–4624.

    Article  Google Scholar 

  12. Brandy, J. S., Tesche, B., Busser, W. et al., Surface spectroscopic study of the stabilization mechanism for shape-selectively synthesized nanostructured transition metal colloids, J. Am. Chem. Soc., 2000, 122(19), 4631–4636.

    Article  Google Scholar 

  13. Qian, Y. T., Chemistry of Crystallization (in Chinese), Hefei: USTC Press, 1988, 40–41.

    Google Scholar 

  14. Kreibig, U., Electronic properties of small silver particles: the optical constants and their temperature dependence, J. Phys. F., 1974, 4: 999–1014.

    Article  Google Scholar 

  15. Kreibig, U., Schmitz, B., Breuer, H. D., Separation of plasom-polariton mode of small metal particles, Phys. Rev. B, 1987, 36(9): 5027–5030.

    Article  Google Scholar 

  16. Creighton, J. A., Eadon, D. G., Ultravoilet-visible absorption spectra of the colloidal metallic elements, J. Chem. Soc. Faraday. Trans., 1991, 87(24): 3881–3891.

    Article  Google Scholar 

  17. Henglein, A., Physicochemical properties of small metal particles in solution: “microelectrode reactions, chemisoption, composite metal particles, and the atom to metal trasition, J. Phys. Chem., 1993, 97(21): 5457–5471.

    Article  Google Scholar 

  18. Kreibig, U., Genzel, L., Optical absorption of small metallic particles. Surf. Sci., 1985, 156: 678–700.

    Article  Google Scholar 

  19. Henglein, A., Tausch-Treml, R., Optical absorption and catalytic activity of subcolloidal and colloidal silver in aqueous solution: a pulse radiolysis study, J. Colloid Interface Sci., 1981, 80: 84–93.

    Article  Google Scholar 

  20. Furlong, D. N., Launikonis, A. L., Sasse, W. H. F., Colloidal platinum sol. J. Chem. Soc, Faraday Trans. 1, 1984, 80: 571–588.

    Article  Google Scholar 

  21. Henglein, A., Ershov, B. G., Malow, M., Absorption spectrum and some chemical reactions of colloidal platinum in aqueous solution, J. Phys. Chem., 1995, 99(38): 14129–14136.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Chemistry, Tsinghua University, 100084, Beijing, China

    Yingtao Yu & Boqing Xu

Authors
  1. Yingtao Yu
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Boqing Xu
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Boqing Xu.

About this article

Cite this article

Yu, Y., Xu, B. Selective formation of tetrahedral Pt nanocrystals from K2PtCl6/PVP. Chin.Sci.Bull. 48, 2589–2593 (2003). https://doi.org/10.1360/03wb0098

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1360/03wb0098

Keywords

  • platinum nanocrystals
  • shape-controlled synthesis
  • tetrahedron
  • UV-Vis absorption
  • nanotechnology