ZnO–Au nanohybrids by rapid microwave-assisted synthesis for CO oxidation

Paromita Kundu; Nisha Singhania; Giridhar Madras; N. Ravishankar

doi:10.1039/C2DT30882G

ZnO–Au nanohybrids by rapid microwave-assisted synthesis for CO oxidation

Paromita Kundu,^a Nisha Singhania,^a Giridhar Madras^b and N. Ravishankar*^a

* Corresponding authors

^a Materials Research Centre, Indian Institute of Science, Bangalore, India
E-mail: nravi@mrc.iisc.ernet.in
Fax: +080 23607316
Tel: +080 22933255

^b Department Chemical Engineering, Indian Institute of Science, Bangalore, India

Abstract

We present a green method for the synthesis of ZnO–Au hybrids using an ultrafast microwave-based technique. This method provides good control over the nucleation of the metal nanoparticles on the oxide support, which governs the morphology and microstructure of the hybrids. The hybrids exhibit good catalytic activity for CO oxidation compared to similar hybrids reported in the literature. Detailed XPS investigation reveals the presence of Au–Zn and Au–O bonds at the interface. This surface doping leads to the formation of anionic and cationic Au sites that contribute to the enhanced activity. Our method is general and can be applied for designing other supported catalysts with controlled interfaces.

Supplementary files

Publication details

The article was received on 23 Apr 2012, accepted on 28 May 2012 and first published on 29 May 2012

Article type: Communication

DOI: 10.1039/C2DT30882G

Citation: Dalton Trans., 2012,41, 8762-8766

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ZnO–Au nanohybrids by rapid microwave-assisted synthesis for CO oxidation

P. Kundu, N. Singhania, G. Madras and N. Ravishankar, Dalton Trans., 2012, 41, 8762
DOI: 10.1039/C2DT30882G
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Dalton Transactions

ZnO–Au nanohybrids by rapid microwave-assisted synthesis for CO oxidation

Abstract

Supplementary files

Publication details

ZnO–Au nanohybrids by rapid microwave-assisted synthesis for CO oxidation

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