Porous, catalytically active palladium nanostructures by tuning nanoparticle interactions in an organic medium

Aditi Halder; S. Patra; B. Viswanath; N. Munichandraiah; N. Ravishankar

doi:10.1039/C0NR00640H

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Nanoscale

Issue 2, 2011

A new peer reviewed journal publishing experimental and theoretical work across the breadth of nanoscience and nanotechnology

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Porous, catalytically active palladium nanostructures by tuning nanoparticle interactions in an organic medium

Aditi Halder,^a S. Patra,^b B. Viswanath,^a N. Munichandraiah^b and N. Ravishankar*^a

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Materials Research Centre, Indian Institute of Science, Bangalore, India
E-mail: nravi@mrc.iisc.ernet.in

Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, India

Nanoscale, 2011,3, 725-730

DOI: 10.1039/C0NR00640H
Received 31 Aug 2010, Accepted 18 Oct 2010
First published online 07 Dec 2010

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Abstract
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We present a simple template-free method for the synthesis of interconnected hierarchical porous palladium nanostructures by controlling the aggregation of nanoparticles in organic media. The interaction between the nanoparticles is tuned by varying the dielectric constant of the medium consistent with DLVO calculations. The reaction products range from discrete nanoparticles to compact porous clusters with large specific surface areas. The nanoclusters exhibit hierarchical porosity and are found to exhibit excellent activity towards the reduction of 4-nitrophenol into 4-aminophenol and hydrogen oxidation. The method opens up possibilities for synthesizing porous clusters of other functional inorganics in organic media.

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Additional figures of the Pd nanostructures
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Aditi Halder
S. Patra
B. Viswanath
N. Munichandraiah
N. Ravishankar

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