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Preparation, Structure and Properties of Novel Bimetallic Au/Pd Colloids

Published online by Cambridge University Press:  15 February 2011

Christopher J. Baddeley ,
David A. Jefferson ,
Richard M. Lambert ,
R. Mark Ormerod ,
Trevor Rayment ,
Günter Schmid  and
Andrew P. Walker
Christopher J. Baddeley
Affiliation:
Department of Chemistry, University of Cambridge, Cambridge CB2 lEW, UK
David A. Jefferson
Affiliation:
Department of Chemistry, University of Cambridge, Cambridge CB2 lEW, UK
Richard M. Lambert
Affiliation:
Department of Chemistry, University of Cambridge, Cambridge CB2 lEW, UK
R. Mark Ormerod
Affiliation:
Department of Chemistry, University of Cambridge, Cambridge CB2 lEW, UK
Trevor Rayment
Affiliation:
Department of Chemistry, University of Cambridge, Cambridge CB2 lEW, UK
Günter Schmid
Affiliation:
Institut für Anorganische Chemie, Universität-GH Essen, 4300 Essen 1, Germany
Andrew P. Walker
Affiliation:
Department of Chemistry, University of Cambridge, Cambridge CB2 lEW, UK
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Abstract

Ligand-stabilized bimetallic Au/Pd colloids may be prepared from 180–200Å Au colloids which can be covered by Pd shells of varying thickness. They can be isolated as solid materials without agglomeration. HREM observations indicate a narrow particle size distribution and reveal a well-defined Au(core)/Pd(shell) structure. This is convincingly confirmed by EXAFS data. Thermal treatment leads to Au/Pd alloy formation at ≥ 500 K, as evidenced by the appearance of characteristic Au-Pd distances in the EXAFS.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 272: Symposium O – Chemical Processes in Inorganic Materials: Metal and Semiconductor Clusters , 1992 , 85
Copyright
Copyright © Materials Research Society 1992

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References

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