Colloid and Polymer Science

, Volume 275, Issue 4, pp 333–340

Transition metal nanoparticles protected by amphiphilic block copolymers as tailored catalyst systems

  • A. B. R. Mayer
  • J. E. Mark
Original Contribution

DOI: 10.1007/s003960050090

Cite this article as:
Mayer, A.B.R. & Mark, J.E. Colloid Polym Sci (1997) 275: 333. doi:10.1007/s003960050090


Several stable palladium, platinum, silver, and gold colloids were prepared by reducing the corresponding metal precursors in the presence of protective amphiphilic block copolymers. Some palladium and platinum precursors with different hydrophobicities, namely palladium chloride PdCl2, palladium acetate Pd(CH3COO)2, hexachloroplatinic acid H2PtCl6, and platinum acetylacetonate Pt(CH3COCH = C(O-)CH3)2, have been used in order to investigate differences in their catalytic activity. The polymers investigated for their ability to stabilize such transition metal colloids were polystyrene-b-poly(ethylene oxide) and polystyrene-b-poly (methacrylic acid). The metal particle sizes and morphologies were determined by transmission electron microscopy and found to be in the nanometer range. The catalytic activity of the palladium and platinum colloids was tested by the hydrogenation of cyclohexene as a model reaction. The protected palladium and platinum nanoparticles were found to be catalytically active, and final conversions up to 100% cyclohexane could be obtained. Depending on the choice of polymer block types and lengths, the precursor type, and the reduction method, different nanoparticle morphologies and catalytic activities could be obtained. These novel catalytically active metal-polymer systems are thus promising candidates for the development of tailored catalyst systems.

Key words

Metal nanoparticles block copolymers catalysis hydrogenation 

Copyright information

© Steinkopff Verlag 1997

Authors and Affiliations

  • A. B. R. Mayer
    • 1
  • J. E. Mark
    • 1
  1. 1.Department of Chemistry and the Polymer Research CenterThe University of CincinnatiCincinnatiUSA

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