Photoelectrochemical Properties of Titanium Dioxide Electrodes Prepared from a Titanium-Aluminum Alloy

A. Kudo, M. Steinberg, A. J. Bard, A. Campion, M. A. Fox, Thomas E. Mallouk, S. E. Webber, J. M. White

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Titanium dioxide electrodes, prepared from titanium-aluminum alloy on a titanium sheet, were examined for photosensitized processes using adsorbed dye molecules, and for photoanodic oxidation of water by direct bandgap excitation. For the photosensitized reactions, which employed ruthenium(II) tris(2-2′-bipyridine-4-4′-dicarboxylic acid) or the iron complex, Prussian blue, the alloy-derived electrode showed photocurrents one to two orders of magnitude higher than for an electrode prepared by oxidation of an unalloyed titanium sheet. Scanning electron micrographs suggest that the high efficiency of the alloy-derived electrode is due to the rough and cracked TiO2 surface. However, for the water oxidation reaction, the differences were much smaller. The different behavior between the photosensitized reactions under sub-bandgap excitation and water photo-oxidation by direct bandgap excitation could be explained by the greater effectiveness of the rough electrode surface in utilization of the adsorbed dye molecules. For the alloy-derived electrodes, photosensitized currents were optimized by varying the temperature used to form the alloy and to oxidize the titanium sheet, and varying the extent of doping.

Original languageEnglish (US)
Pages (from-to)3846-3849
Number of pages4
JournalJournal of the Electrochemical Society
Volume137
Issue number12
DOIs
StatePublished - Jan 1 1990

Fingerprint

titanium alloys
Titanium alloys
titanium oxides
aluminum alloys
Titanium dioxide
Aluminum alloys
Titanium sheet
Electrodes
electrodes
Energy gap
titanium
Oxidation
oxidation
Water
Coloring Agents
Dyes
dyes
water
excitation
Dicarboxylic Acids

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrochemistry

Cite this

Kudo, A., Steinberg, M., Bard, A. J., Campion, A., Fox, M. A., Mallouk, T. E., ... White, J. M. (1990). Photoelectrochemical Properties of Titanium Dioxide Electrodes Prepared from a Titanium-Aluminum Alloy. Journal of the Electrochemical Society, 137(12), 3846-3849. https://doi.org/10.1149/1.2086311
Kudo, A. ; Steinberg, M. ; Bard, A. J. ; Campion, A. ; Fox, M. A. ; Mallouk, Thomas E. ; Webber, S. E. ; White, J. M. / Photoelectrochemical Properties of Titanium Dioxide Electrodes Prepared from a Titanium-Aluminum Alloy. In: Journal of the Electrochemical Society. 1990 ; Vol. 137, No. 12. pp. 3846-3849.
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Kudo, A, Steinberg, M, Bard, AJ, Campion, A, Fox, MA, Mallouk, TE, Webber, SE & White, JM 1990, 'Photoelectrochemical Properties of Titanium Dioxide Electrodes Prepared from a Titanium-Aluminum Alloy', Journal of the Electrochemical Society, vol. 137, no. 12, pp. 3846-3849. https://doi.org/10.1149/1.2086311

Photoelectrochemical Properties of Titanium Dioxide Electrodes Prepared from a Titanium-Aluminum Alloy. / Kudo, A.; Steinberg, M.; Bard, A. J.; Campion, A.; Fox, M. A.; Mallouk, Thomas E.; Webber, S. E.; White, J. M.

In: Journal of the Electrochemical Society, Vol. 137, No. 12, 01.01.1990, p. 3846-3849.

Research output: Contribution to journalArticle

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T1 - Photoelectrochemical Properties of Titanium Dioxide Electrodes Prepared from a Titanium-Aluminum Alloy

AU - Kudo, A.

AU - Steinberg, M.

AU - Bard, A. J.

AU - Campion, A.

AU - Fox, M. A.

AU - Mallouk, Thomas E.

AU - Webber, S. E.

AU - White, J. M.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - Titanium dioxide electrodes, prepared from titanium-aluminum alloy on a titanium sheet, were examined for photosensitized processes using adsorbed dye molecules, and for photoanodic oxidation of water by direct bandgap excitation. For the photosensitized reactions, which employed ruthenium(II) tris(2-2′-bipyridine-4-4′-dicarboxylic acid) or the iron complex, Prussian blue, the alloy-derived electrode showed photocurrents one to two orders of magnitude higher than for an electrode prepared by oxidation of an unalloyed titanium sheet. Scanning electron micrographs suggest that the high efficiency of the alloy-derived electrode is due to the rough and cracked TiO2 surface. However, for the water oxidation reaction, the differences were much smaller. The different behavior between the photosensitized reactions under sub-bandgap excitation and water photo-oxidation by direct bandgap excitation could be explained by the greater effectiveness of the rough electrode surface in utilization of the adsorbed dye molecules. For the alloy-derived electrodes, photosensitized currents were optimized by varying the temperature used to form the alloy and to oxidize the titanium sheet, and varying the extent of doping.

AB - Titanium dioxide electrodes, prepared from titanium-aluminum alloy on a titanium sheet, were examined for photosensitized processes using adsorbed dye molecules, and for photoanodic oxidation of water by direct bandgap excitation. For the photosensitized reactions, which employed ruthenium(II) tris(2-2′-bipyridine-4-4′-dicarboxylic acid) or the iron complex, Prussian blue, the alloy-derived electrode showed photocurrents one to two orders of magnitude higher than for an electrode prepared by oxidation of an unalloyed titanium sheet. Scanning electron micrographs suggest that the high efficiency of the alloy-derived electrode is due to the rough and cracked TiO2 surface. However, for the water oxidation reaction, the differences were much smaller. The different behavior between the photosensitized reactions under sub-bandgap excitation and water photo-oxidation by direct bandgap excitation could be explained by the greater effectiveness of the rough electrode surface in utilization of the adsorbed dye molecules. For the alloy-derived electrodes, photosensitized currents were optimized by varying the temperature used to form the alloy and to oxidize the titanium sheet, and varying the extent of doping.

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