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Issue 17, 2012
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Morphology control of 1D noble metal nano/heterostructures towards multi-functionality

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Abstract

We synthesize Pt, Pd, Au and layered multimaterial nanotubes via electrodeposition in anodic aluminium oxide (AAO) templates. We show that time controlled growth at constant electrolyte concentration allows the morphology and chemistry of the nanostructure to be controlled to a high degree. In particular the wall thickness of the nanotubes can be tuned from thin wall nanotubes to nanorods. The applications targeted are electrocatalysis, plasmon resonance and molecular detection via surface enhanced Raman spectroscopy (SERS). The electro-oxidation of methanol on Pt and that of formic acid on Pd are investigated and compared with state of the art Pt/C and Pd/C catalysts and some of the recent similar work from the literature. Nanotubes of both metals (Pt, Pd) show very high electrochemical surface area (ECSA) and enhanced electrocatalytic activity. Our electrocatalysis results show great promise towards direct liquid fuel cells. In terms of molecular detection using SERS we show that the SERS activity of Au-nanostructures is strongly dependent on morphology with very high SERS enhancements being related to partly filled Au-nanotubes.

Graphical abstract: Morphology control of 1D noble metal nano/heterostructures towards multi-functionality

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Publication details

The article was received on 24 Dec 2011, accepted on 27 Feb 2012 and first published on 22 Mar 2012


Article type: Paper
DOI: 10.1039/C2JM16826J
Citation: J. Mater. Chem., 2012,22, 8671-8679
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    Morphology control of 1D noble metal nano/heterostructures towards multi-functionality

    F. I. Dar, S. Habouti, R. Minch, M. Dietze and M. Es-Souni, J. Mater. Chem., 2012, 22, 8671
    DOI: 10.1039/C2JM16826J

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