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Electrocatalytic and SERS activity of Pt rich Pt-Pb nanostructures formed via the utilisation of in-situ underpotential deposition of lead

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Abstract

The controlled synthesis of nanostructured materials remains an ongoing area of research, especially as the size, shape and composition of nanomaterials can greatly influence their properties and applications. In this work, we present the electrodeposition of highly dendritic platinum rich platinum-lead nanostructures, where lead acetate acts as an inorganic shape directing agent via underpotential deposition on the growing electrodeposit. It was found that these nanomaterials readily oxidise at potentials below monolayer oxide formation, which significantly impacts on the methanol electrooxidation reaction and correlates with the Incipient Hydrous Oxide Adatom Mediator (IHOAM) model of electrocatalysis. Additionally, these materials were tested for their surface enhanced Raman scattering (SERS) activity, where the high density of sharp tips provides promise for their application as SERS substrates.

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Acknowledgments

The financial support from the Platform Technologies Research Institute, RMIT University (AOM) and the Australian Research Council through the Future Fellowship Scheme FT110100760 (AOM) and Discovery Project DP0988099 (AOM, VB, SKB) is gratefully acknowledged. The authors also acknowledge the facilities and the scientific and technical assistance of the Australian Microscopy and Microanalysis Research Facility at the RMIT Microscopy and Microanalysis Facility.

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Authors and Affiliations

  1. Centre for Advanced Materials and Industrial Chemistry, RMIT University, GPO Box 2476V, Melbourne, VIC, Australia

    Blake J. Plowman, Samuel J. Ippolito, Vipul Bansal & Suresh K. Bhargava

  2. School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne, VIC, Australia

    Blake J. Plowman, Muhammad E. Abdelhamid, Samuel J. Ippolito, Vipul Bansal, Suresh K. Bhargava & Anthony P. O’Mullane

  3. School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, GPO Box 2434, Brisbane, QLD, 4001, Australia

    Anthony P. O’Mullane

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  1. Blake J. Plowman
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  2. Muhammad E. Abdelhamid
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  3. Samuel J. Ippolito
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  6. Anthony P. O’Mullane
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Correspondence to Anthony P. O’Mullane.

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Plowman, B.J., Abdelhamid, M.E., Ippolito, S.J. et al. Electrocatalytic and SERS activity of Pt rich Pt-Pb nanostructures formed via the utilisation of in-situ underpotential deposition of lead. J Solid State Electrochem 18, 3345–3357 (2014). https://doi.org/10.1007/s10008-014-2622-9

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