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    Macroporous platinum electrodes for hydrogen oxidation in ionic liquids

    257641.pdf (1.089Mb)
    Access Status
    Open access
    Authors
    Hussain, G.
    Sofianos, M.
    Lee, J.
    Gibson, C.
    Buckley, C.
    Silvester, Debbie
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Hussain, G. and Sofianos, M. and Lee, J. and Gibson, C. and Buckley, C. and Silvester, D. 2018. Macroporous platinum electrodes for hydrogen oxidation in ionic liquids. Electrochemistry Communications. 86: pp. 43-47.
    Source Title
    Electrochemistry Communications
    DOI
    10.1016/j.elecom.2017.11.011
    ISSN
    1388-2481
    School
    Nanochemistry Research Institute
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP150101708
    http://purl.org/au-research/grants/arc/LE130100121
    URI
    http://hdl.handle.net/20.500.11937/59316
    Collection
    • Curtin Research Publications
    Abstract

    Macroporous platinum structures have been prepared by electrodeposition in the interstitial spaces between a 500 nm polystyrene sphere template, onto platinum and glassy carbon electrodes. The structures were analysed with scanning electron microscopy and confocal microscopy. These electrodes are employed for the electrochemical oxidation of hydrogen in the room temperature ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C 2 mim][NTf 2 ]). The behaviour on the porous electrodes showed obvious thin-layer characteristics in the cyclic voltammetry, with a strong tendency for hydrogen to accumulate and remain in the pores after being removed from the cell. Plots of peak current vs concentration (10–100% H 2 ) were linear, but currents continued to increase over time. The sensitivities (gradients) of the calibration plots were the highest for the platinum porous structures (compared to the bare, or nanoparticle-modified surfaces). Due to the accumulation of gas, such modified electrodes could be employed as leak-detectors for very low concentrations of hydrogen.

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