Control of the size of platinum particles on silica surfaces using organic-inorganic composites

Abstract

A series of two tartaric acid-silica (sol-gel and impreg tart-SiO₂) composites with different tartaric acid contents were prepared using sol-gel and impregnation methods, and then a series of two platinum-silica composites (impreg·sol-gel Pt-SiO₂ and impreg·impreg Pt-SiO₂) were obtained by impregnating sol-gel and impreg tart-SiO₂ with a platinum solution, followed by drying and calcining. The platinum-silica composites which were obtained were characterized by XRD, N₂ and H₂ adsorption and SEM. From the results, it is concluded that the distribution and particle size of platinum in Pt-SiO₂ can be controlled by using two types of tartaric acid-silica composites with different tartaric acid contents, while keeping the platinum loading constant.

References

1. E. M. Landau, S. Grayer Wolf, M. Levanon, L. Leiserowitz, M. Lahav and J. Sagiv, J. Am. Chem. Soc., 1989, 111, 1436.
2. B. R. Heywood and S. Mann, Adv. Mater., 1992, 4, 278.
3. D. D. Archibald and S. Mann, Nature, 1993, 364, 430.
4. J. M. Didymus, P. Oliver, S. Mann, A. L. DeVries, P. V. Hauschka and P. Westbroek, J. Chem. Soc., Faraday Trans., 1993, 89, 2891.
5. S. Mann, Nature, 1993, 365, 499.
6. S. Mann, J. Chem. Soc., Dalton Trans., 1993, 1.
7. S. Mann, D. D. Archibald, J. M. Didymus, T. Douglas, B. R. Heywood, F. C. Meldrum and N. J. Reeves, Science, 1993, 261, 1286.
8. M. E. Davis, Nature, 1993, 364, 391.
9. C. T. Kresge, M. E. Leonowicz, W. J. Roth, J. C. Vartuli and J. S. Beck, Nature, 1992, 359, 710.
10. J. S. Beck, J. C. Vartuli, W. J. Roth, M. E. Leonowicz, C. T. Kresge, K. D. Schmitt, C. T. W. Chu, D. H. Olson, E. W. Sheppard, S. B. McCullen, J. B. Higgins and J. L. Schlenker, J. Am. Chem. Soc., 1992, 114, 10834.
11. A. Monnier, F. Schuth, Q. Huo, D. Kumar, D. Margolese, R. S. Maxwell, G. D. Stucky, M. Krishnamurty, P. Petroff, A. Firouzi, M. Janicke and B. F. Chmelka, Science, 1993, 261, 1299.
12. Q. Huo, D. I. Margolese, U. Ciesla, P. Feng, T. E. Gier, P. Sieger, R. Leon, P. M. Petroff, F. Schuth and G. D. Stucky, Nature, 1994, 368, 317.
13. F. C. Meldrum, V. J. Wade, D. L. Nimmo, B. R. Heywood and S. Mann, Nature, 1991, 349, 684.
14. F. Mizukami, Y. Kobayashi, S. Niwa, M. Toba and K. Shimizu, J. Chem. Soc., Chem. Commun., 1988, 1540.
15. K. Maeda, F. Mizukami, S. Miyashita, S. Niwa and M. Toba, J. Chem. Soc., Chem. Commun., 1990, 1268.
16. K. Kojima, F. Mizukami, M. Miyazaki and K. Maeda, J. Non-Cryst. Solids, 1992, 147 & 148, 442.
17. F. Mizukami, S. Niwa, S. Ohkawa and A. Katayama, Stud. Surf. Sci. Catal., 1993, 78, 337.
18. K. Maeda, F. Mizukami, M. Watanabe, S. Niwa and M. Toba, Chem. Ind. (London), 1989, 807.
19. M. Toba, F. Mizukami, S. Niwa and K. Maeda, J. Chem. Soc., Chem. Commun., 1990, 1211.
20. S. Niwa, F. Mizukami, S. Isoyama, T. Tsuchiya, K. Shimizu, S. Imai and J. Imamura, J. Chem. Technol. Biotechnol., 1986, 36, 236.
21. H. Izutsu, F. Mizukami, Y. Kiyozumi and K. Maeda, J. Am. Ceram. Soc., 1997, 80, 2581.
22. F. Mizukami, H. Izutsu and T. Osaka, Adv. Mater., 1994, 6, 854.
23. K. Nakanishi and N. Soga, J. Am. Ceram. Soc., 1991, 74, 2518.
24. J. W. Cahn, J. Chem. Phys., 1965, 42, 93.
25. J. J. Hammel, J. Chem. Phys., 1967, 46, 2234.
26. J. W. Cahn, Trans. Metall. Soc. AIME, 1968, 242, 166.