Matrix-Assisted Synthesis of Palladium Nanocage and Nanowires

Abstract

Our study describes the synthesis of novel nanoscale Pd cage and wires whose sizes and shapes are templated by mesoporous matrices. The templates used are cubic phase MCM-48 and hexagonal phase CnMCM-41 (n = 16, and 22), SBA-15, which have pore diameters of ∼3, ∼3.8, ∼4.7, and ∼9 nm, respectively. For Pd@MCM-48, the Pd metal forms spherical domains (∼38 nm) consisting of three dimensionally interconnected into Pd arrays; for Pd@SBA-15 and Pd@MCM-41, the Pd metal forms of one-dimensional wires. Etching out the matrix produces porous Pd cages (pore sizes of ∼1.5–2.0 nm) with retaining original domain sizes of ∼38 nm; similarly Pd@SBA-15 and Pd@MCM-41 afford freestanding Pd nanowires. All the materials are examined by TEM, XRD, BET, and EDAX analysis. Furthermore, the thermal behavior of Pd nanowire is briefly described.

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Reference

  1. 1.

    A. P. Alivisatos, Science, 271, 933 (1996).

    CAS  Article  Google Scholar 

  2. 2a)

    C. Wu and T. Bein, Science, 264, 1757 (1994).

    CAS  Article  Google Scholar 

  3. 2b)

    C. Wu and T. Bein, Science, 266, 1013 (1994).

    CAS  Article  Google Scholar 

  4. 2c)

    C. R. Martin, Chem. Mater., 8, 1739 (1996).

    CAS  Article  Google Scholar 

  5. 3.

    J. Y. Ying, C. D. Mehnert and M. S. Wong, Angew. Chem., Int. Ed. Engl., 38, 56 (1999).

    CAS  Article  Google Scholar 

  6. 4.

    S. A. Johnson, P. J. Ollovier and T. E. Mallouk, Science, 283, 963 (1999).

    CAS  Article  Google Scholar 

  7. 5.

    R. Ryoo, S. H. Joo and S. Jun,J. Phys. Chem. B, 103, 7743 (1999).

    CAS  Article  Google Scholar 

  8. 6.

    G. S. Attard, P. N. Bartlett, R. B. Coleman, J. M. Elliott, J. R. Owen and J. H. Wang, Science, 278, 838 (1997).

    CAS  Article  Google Scholar 

  9. 7a)

    Y. J. Han, J. Kim and G. D. Stucky, Chem. Mater., 12, 2068 (2000).

    CAS  Article  Google Scholar 

  10. 7b)

    M. H. Huang, A. Choudrey and P. Yang, Chem. Commun. 1063 (2000).

  11. 7c)

    H. Kang, Y. Jun, J.-I. Park, K.-B. Lee, and J. Cheon, Chem. Mater., 12, 3530 (2000).

    CAS  Article  Google Scholar 

  12. 8.

    O. D. Velev, P. M. Tessier, A. M. Lenhoff and E. W. Kaler, Nature, 401, 548 (1999).

    CAS  Article  Google Scholar 

  13. 9.

    McGraw-Hill Concise Encyclopedia of Science and Technology, ed. S. P. Parker (McGraw- Hill: New York, 1989) pp.1343.

    Google Scholar 

  14. 10.

    The cubic MCM-48 and hexagonal SBA-15 hosts were prepared by a literature method. See: D. Zhao, J. Feng, Q. Huo, N. Melosh, G. H. Fredrickson, B. F. Chmelka and G. D. Stucky, Science, 279, 548 (1998).

    CAS  Article  Google Scholar 

  15. 11.

    Pd(hfac)2 was synthesized following a literature method. See: A. R. Siedle, R. A. Newmark, A. A. Kruger, L. H. Pignolet, Inorg. Chem., 20, 3399 (1981).

    CAS  Article  Google Scholar 

  16. 12.

    Pd(hfac)2 is known to adsorb readily on silica surfaces by means of strong Lewis acid-base interactions between the Pd center and surface hydroxyl groups. See: A. R. Siedle and R. A. Newmark, J. Am. Chem. Soc., 103, 1240 (1981).

    CAS  Article  Google Scholar 

  17. 13.

    L. Conners, T. Hollis, D. A. Johnson and G. Blyholder, J. Phys. Chem. B, 102, 10112 (1998).

    CAS  Article  Google Scholar 

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Correspondence to Jinwoo Cheon.

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Cheon, J., Lee, KB., Kang, H. et al. Matrix-Assisted Synthesis of Palladium Nanocage and Nanowires. MRS Online Proceedings Library 635, C3.3 (2000). https://doi.org/10.1557/PROC-635-C3.3

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