Abstract
Mesoporous molecular sieve MCM-41 with a Si/Al ratio of 35 was obtained by hydrothermal synthesis using a gel mixture with a molar composition of 6 SiO2∶0.1 Al2O3∶1 hexadecyltrimethylammonium chloride∶ 0.25 dodecyltrimethylammonium bromide∶ 0.25 tetrapropylammonium bromide∶0.15 (NH4)2O∶1.5 Na2O∶300 H2O. The MCM-41 sample was calcined in O2 flow at 813 K and subsequently ion exchanged with Ca2+. A small Pt cluster has been supported on the MCM-41 sample following a procedure using ion exchange of Pt(NH3) 2+4 . The Pt(NH3) 2+4 ion supported on MCM-41 has been activated in O2 flow at 593 K and subsequently reduced with Fh flow at 573 K, in the same way used for the preparation of a Pt cluster entrapped inside the supercage of zeolite NaY. The resulting Pt cluster supported on the MCM-41 shows hydrogen chemisorption oftotal two H atoms per Pt at 296 K (based on the total amount of Pt) and high catalytic activity for hydrogenolysis of ethane. The chemical shift in129Xe NMR spectroscopy of adsorbed xenon indicates that the Pt cluster is located inside the mesoporous molecular sieve.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
C.T. Kresge, M.E. Leonowicz, W.J. Roth, J.C. Vartuli and J.S. Beck, Nature 359 (1992) 710.
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. 113 (1992) 10834.
A. Corma, M.T. Navarro, J. Pérez-Pariente and F. Sánchez, J. Chem. Soc. Chem. Commun. (1994) 147.
P.T. Tanev, M. Chibwe and T.J. Pinnavaia, Nature 368 (1994) 321.
T. Inui, J.-B. Kim and M. Seno, Catal. Lett. 29 (1994) 271.
E. Armengol, M.L. Cano, A. Corma, H. Garcia and M.T. Navarro, J. Chem. Soc. Chem. Commun. (1995) 519.
A. Corma, V. Fornés, M.T. Navarro and J. Pérez-Pariente, J. Catal. 148 (1994) 569.
C.-G. Wu and T. Bein, Chem. Mater. 6 (1994) 1109.
J.M. Kim, J.H. Kwak, S. Jun and R. Ryoo, J. Phys. Chem., in press.
R. Ryoo, S.J. Cho, C. Pak and J.Y. Lee, Catal. Lett. 20 (1993) 107.
H. Ihee, T. Bécue, R. Ryoo, C. Potvin, J.-M. Manoli and G. Djéga-Mariadassou, in:Zeolites and Related Microporous Materials: State of the Art 1994, Studies in Surface Science and Catalysis, Vol. 84, eds. J. Weitkamp et al. (Eisevier, Amsterdam, 1994) p. 765.
R. Ryoo and J.M. Kim, J. Chem. Soc. Chem. Commun. (1995) 711.
C.-Y. Chen, H.-X. Li and M.E. Davis, Micropor. Mater. 2 (1993) 17.
I.H. Cho, S.J. Cho, S.B. Park and R. Ryoo, J. Catal. 153 (1995) 232.
R. Ryoo, S.J. Cho, C. Pak, J.-G. Kim, S.-K. Ihm and J.Y. Lee, J. Am. Chem. Soc. 114 (1992) 76.
O.B. Yang, S.I. Woo and R. Ryoo, J. Catal. 123 (1990) 375.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ryoo, R., Ko, C.H., Kim, J.M. et al. Preparation of nanosize Pt clusters using ion exchange of Pt(NH3) 2+4 inside mesoporous channel of MCM-41. Catal Lett 37, 29–33 (1996). https://doi.org/10.1007/BF00813515
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00813515