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Issue 41, 2013
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Electrogeneration of platinum nanoparticles in a matrix of dendrimer–carbon nanotubes

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Abstract

Hybrid materials with enhanced properties can now be obtained by combining nanomaterials such as carbon nanotubes and metallic nanoparticles, where the main challenge is to control fabrication conditions. In this study, we demonstrate that platinum nanoparticles (PtNps) can be electrogenerated within layer-by-layer (LbL) films of polyamidoamine (PAMAM) dendrimers and single-walled carbon nanotubes (SWCNTs), which serve as stabilizing matrices. The advantages of the possible control through electrogeneration were demonstrated with a homogeneous distribution of PtNps over the entire surface of the PAMAM/SWCNT LbL films, whose electroactive sites could be mapped using magnetic force microscopy. The Pt-containing films were used as catalysts for hydrogen peroxide reduction, with a decrease in the reduction potential of 60 mV compared to a Pt film deposited onto bare ITO. By analyzing the mechanisms responsible for hydrogen peroxide reduction, we ascribed the enhanced catalytic activity to synergistic effects between platinum and carbon in the LbL films, which are promising for sensing and fuel cell applications.

Graphical abstract: Electrogeneration of platinum nanoparticles in a matrix of dendrimer–carbon nanotubes

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Publication details

The article was received on 28 Jun 2013, accepted on 03 Sep 2013 and first published on 04 Sep 2013


Article type: Paper
DOI: 10.1039/C3CP52707G
Citation: Phys. Chem. Chem. Phys., 2013,15, 17887-17892
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    Electrogeneration of platinum nanoparticles in a matrix of dendrimer–carbon nanotubes

    L. H. S. Gasparotto, A. L. B. Castelhano, R. C. Gabriel, N. O. Dantas, O. N. Oliveira and J. R. Siqueira, Phys. Chem. Chem. Phys., 2013, 15, 17887
    DOI: 10.1039/C3CP52707G

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