Issue 12, 2014

Confined space synthesis of fully alloyed and sinter-resistant AuPd nanoparticles encapsulated in porous silica

Abstract

Facile synthesis of highly sinter-resistant silica encapsulated Au–Pd alloy nanocatalysts with average particle size stabilized at ∼4.5 nm even after calcination at 750 °C temperature is reported. The synthesis was achieved by utilizing thiol protected ultra small clusters of Au and Pd as precursors for silica encapsulation. The presence of intimate mixtures of the clusters within silica encapsulation ensures the formation of fully alloyed nanoparticles at high temperatures, at the same time controlling further growth and sintering. At optimum alloy compositions, these catalysts showed high catalytic activity for CO oxidation displaying low light-off temperatures.

Graphical abstract: Confined space synthesis of fully alloyed and sinter-resistant AuPd nanoparticles encapsulated in porous silica

Supplementary files

Article information

Article type
Paper
Submitted
14 Dec 2013
Accepted
10 Jan 2014
First published
10 Jan 2014

J. Mater. Chem. A, 2014,2, 4398-4405

Confined space synthesis of fully alloyed and sinter-resistant AuPd nanoparticles encapsulated in porous silica

A. Samanta, T. Rajesh and R. Nandini Devi, J. Mater. Chem. A, 2014, 2, 4398 DOI: 10.1039/C3TA15194H

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