Dye-sensitized semiconductor photoelectrochemical cells for overall water splitting

Seung Hyun Anna Lee, W. Justin Youngblood, Landy K. Blasdel, Thomas E. Mallouk, Thomas A. Moore, Ana L. Moore, Devens Gust

Research output: Contribution to journalConference article

Abstract

Photocatalytic water splitting has been one of the grand challenges of chemical research. Since the first discovery of photoassisted water electrolysis using ultraviolet light in 1972, there have been many reports on oxide photocatalysts. However, there has been little progress on molecule-oxide water splitting systems. These photosensitizers can act as visible light absorber and linker to couple photocatalytic nanoparticles and the semiconductor films to build an organic-inorganic hybrid photocatalytic water splitting system. We recently reported that IrO2nH2O (1-3 nm diameter) nanoparticles can be stabilized by Ru-tris(bipyridyl) complexes and studied their performance as oxygen evolving photocatalysts . These results inspired us to construct an overall water splitting dye-sensitized cell. The quantum efficiency of the system is quite low (0.8%) due to rapid back electron transfer from TiO2 to the oxidized sensitizer. We are currently exploring different buffers and investigating composite metal oxide films for a more efficient water splitting system.

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
StatePublished - Dec 1 2010
Event239th ACS National Meeting and Exposition - San Francisco, CA, United States
Duration: Mar 21 2010Mar 25 2010

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Photoelectrochemical cells
Coloring Agents
Dyes
Semiconductor materials
Water
Photocatalysts
Oxides
Nanoparticles
2,2'-Dipyridyl
Photosensitizing Agents
Photosensitizers
Quantum efficiency
Electrolysis
Oxide films
Buffers
Metals
Oxygen
Molecules
Electrons
Composite materials

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Lee, S. H. A., Youngblood, W. J., Blasdel, L. K., Mallouk, T. E., Moore, T. A., Moore, A. L., & Gust, D. (2010). Dye-sensitized semiconductor photoelectrochemical cells for overall water splitting. ACS National Meeting Book of Abstracts.
Lee, Seung Hyun Anna ; Youngblood, W. Justin ; Blasdel, Landy K. ; Mallouk, Thomas E. ; Moore, Thomas A. ; Moore, Ana L. ; Gust, Devens. / Dye-sensitized semiconductor photoelectrochemical cells for overall water splitting. In: ACS National Meeting Book of Abstracts. 2010.
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Lee, SHA, Youngblood, WJ, Blasdel, LK, Mallouk, TE, Moore, TA, Moore, AL & Gust, D 2010, 'Dye-sensitized semiconductor photoelectrochemical cells for overall water splitting', ACS National Meeting Book of Abstracts.

Dye-sensitized semiconductor photoelectrochemical cells for overall water splitting. / Lee, Seung Hyun Anna; Youngblood, W. Justin; Blasdel, Landy K.; Mallouk, Thomas E.; Moore, Thomas A.; Moore, Ana L.; Gust, Devens.

In: ACS National Meeting Book of Abstracts, 01.12.2010.

Research output: Contribution to journalConference article

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AU - Lee, Seung Hyun Anna

AU - Youngblood, W. Justin

AU - Blasdel, Landy K.

AU - Mallouk, Thomas E.

AU - Moore, Thomas A.

AU - Moore, Ana L.

AU - Gust, Devens

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AB - Photocatalytic water splitting has been one of the grand challenges of chemical research. Since the first discovery of photoassisted water electrolysis using ultraviolet light in 1972, there have been many reports on oxide photocatalysts. However, there has been little progress on molecule-oxide water splitting systems. These photosensitizers can act as visible light absorber and linker to couple photocatalytic nanoparticles and the semiconductor films to build an organic-inorganic hybrid photocatalytic water splitting system. We recently reported that IrO2nH2O (1-3 nm diameter) nanoparticles can be stabilized by Ru-tris(bipyridyl) complexes and studied their performance as oxygen evolving photocatalysts . These results inspired us to construct an overall water splitting dye-sensitized cell. The quantum efficiency of the system is quite low (0.8%) due to rapid back electron transfer from TiO2 to the oxidized sensitizer. We are currently exploring different buffers and investigating composite metal oxide films for a more efficient water splitting system.

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Lee SHA, Youngblood WJ, Blasdel LK, Mallouk TE, Moore TA, Moore AL et al. Dye-sensitized semiconductor photoelectrochemical cells for overall water splitting. ACS National Meeting Book of Abstracts. 2010 Dec 1.