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Shape-controlled Synthesis of Silver and Palladium Nanocrystals using β-Cyclodextrin

Published online by Cambridge University Press:  21 May 2012

Gilles Berhault ,
Hafedh Kochkar  and
Abdelhamid Ghorbel
Gilles Berhault
Affiliation:
Institut de Recherches sur la Catalyse et l’Environnement (IRCELYON), CNRS – University Lyon I, Villeurbanne, France
Hafedh Kochkar
Affiliation:
Laboratoire de Chimie des Matériaux et Catalyse, University El Manar, Tunis, Tunisia
Abdelhamid Ghorbel
Affiliation:
Laboratoire de Chimie des Matériaux et Catalyse, University El Manar, Tunis, Tunisia
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Abstract

ABSTRACT

Shape-controlled Ag and Pd nanocrystals were synthesized using seed-mediated techniques using β-cyclodextrin (β-CD) as structuring agent. First, seeds were obtained by reacting Na2PdCl4 or AgNO3 with a strong reducing agent, NaBH4 in the presence of sodium citrate dihydrate acting as stabilizing agent. These seeds were then injected into a growth solution containing the same metallic precursor, ascorbic acid (as a weak reducing agent) and β-CD as structuring agent. TEM results emphasize a strong influence of the relative concentration of β-CD on the final morphology. In the case of silver, well-facetted nanocrystals were obtained with a progressive shift from kinetically to thermodynamically-controlled nanoobjects when increasing the β-CD/Ag molar ratio. On palladium, β-CD leads to the formation of dendrites (urchin-like) or multipods through controlled aggregation of primary particles. The use of β-CD does not interfere negatively with the catalytic properties of the Pd nanocrystals in the hydrogenation of cinnamaldehyde.

Keywords

AgPdnanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1446: Symposium U – Materials for Catalysis in Energy , 2012 , mrss12-1446-u11-08
Copyright
Copyright © Materials Research Society 2012

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References

REFERENCES

1. Perez-Juste, J., Pastoriza-Santos, I., Liz-Marzán, L. M. and Mulvaney, P., Coord. Chem. Rev. 249, 1870–1901 (2005).Google Scholar
2. Piccolo, L., Valcarcel, A., Bausach, M., Thomazeau, C., Uzio, D. and Berhault, G., Phys. Chem. Chem. Phys. 10, 5504–5506 (2008).Google Scholar
3. Bisson, L., Boissière, C., Nicole, L., Grosso, D., Jolivet, J. P., Thomazeau, C., Uzio, D., Berhault, G. and Sanchez, C., Chem. Mater. 21, 2668–2678 (2009).Google Scholar
4. Delbecq, F. and Sautet, P., J. Catal. 152, 217–236 (1995).Google Scholar