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The reduction of hydrogen peroxide at an Au-coated nanotubular TiO2 array
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Low, C. T. J., Ponce de Leon, C. and Walsh, F. C. (2014) The reduction of hydrogen peroxide at an Au-coated nanotubular TiO2 array. Journal of Applied Electrochemistry, Volume 44 (Number 1). pp. 169-177. doi:10.1007/s10800-013-0623-5 ISSN 0021-891X.
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Official URL: http://dx.doi.org/10.1007/s10800-013-0623-5
Abstract
An Au-coated TiO2 nanotubular array, in the vertically aligned form, was investigated as a highly porous nanostructured electrode for the electrochemical reduction of H2O2 in an acidic sulphate electrolyte at 295 K. The TiO2 nanotubular arrays were formed via a two-stage anodising then nanosized Au particles were sputter deposited onto the surface. The following aspects were studied: (a) the shape evolution of Au particles on the nanotubular array (via surface microstructural imaging), (b) the effect of different degrees of Au loading on the nanotubular array (via voltammetric analysis) and (c) the electrochemical response of an Au–TiO2 nanotubular array compared to a plain, 2-D Au foil. The Au particles could be deposited as a thin 3-D coated layer or as nodular nanostructures on the array. The highly nanoporous structure of the Au–TiO2 electrode led to a large enhancement in the limiting current (enhancement factor up to 6.6) and charge density (enhancement factor up to 8.9) for peroxide reduction compared to a plain Au foil due to the architecture of the ordered, high surface area of the nanotubular array.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Journal or Publication Title: | Journal of Applied Electrochemistry | ||||||
Publisher: | Springer Netherlands | ||||||
ISSN: | 0021-891X | ||||||
Official Date: | January 2014 | ||||||
Dates: |
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Volume: | Volume 44 | ||||||
Number: | Number 1 | ||||||
Page Range: | pp. 169-177 | ||||||
DOI: | 10.1007/s10800-013-0623-5 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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