Optimization of Photoanodes for Photocatalytic Water Oxidation by Combining a Heterogenized Iridium Water‐Oxidation Catalyst with a High‐Potential Porphyrin Photosensitizer
Abstract
Abstract The development of water‐splitting dye‐sensitized photoelectrochemical cells has gained interest owing to their ability to generate renewable fuels from solar energy. In this study, photoanodes were assembled from a SnO 2 film sensitized with a combination of a high‐potential CF 3 ‐substituted porphyrin dye with a tetrahydropyranyl‐protected hydroxamic acid surface‐anchoring group and a Cp*Ir (Cp*=pentamethylcyclopentadienyl) water‐oxidation catalyst containing a silatrane anchoring group. The dye/catalyst ratios were varied from 2:1 to 32:1 to optimize the photocatalytic water oxidation. Photoelectrochemical measurements showed not only more stable and reproducible photocurrents for lower dye/catalyst ratios but also improved photostability. O 2 production was confirmed in real time over a 20 h period with a Clark electrode. Photoanodes prepared from 2:1 and 8:1 dye/catalyst sensitization solutions provided the most active electrodes for photocatalytic water oxidation and performed approximately 30–35 turnovers in 20 h.
- Authors:
-
[1];
[1];
[1]
- Department of Chemistry Yale University New Haven CT 06520 USA, Yale Energy Sciences Institute Yale University West Haven CT 06516 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1402095
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- ChemSusChem
- Additional Journal Information:
- Journal Name: ChemSusChem Journal Volume: 10 Journal Issue: 22; Journal ID: ISSN 1864-5631
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Materna, Kelly L., Jiang, Jianbing, Regan, Kevin P., Schmuttenmaer, Charles A., Crabtree, Robert H., and Brudvig, Gary W. Optimization of Photoanodes for Photocatalytic Water Oxidation by Combining a Heterogenized Iridium Water‐Oxidation Catalyst with a High‐Potential Porphyrin Photosensitizer. Germany: N. p., 2017.
Web. doi:10.1002/cssc.201701693.
Materna, Kelly L., Jiang, Jianbing, Regan, Kevin P., Schmuttenmaer, Charles A., Crabtree, Robert H., & Brudvig, Gary W. Optimization of Photoanodes for Photocatalytic Water Oxidation by Combining a Heterogenized Iridium Water‐Oxidation Catalyst with a High‐Potential Porphyrin Photosensitizer. Germany. https://doi.org/10.1002/cssc.201701693
Materna, Kelly L., Jiang, Jianbing, Regan, Kevin P., Schmuttenmaer, Charles A., Crabtree, Robert H., and Brudvig, Gary W. Mon .
"Optimization of Photoanodes for Photocatalytic Water Oxidation by Combining a Heterogenized Iridium Water‐Oxidation Catalyst with a High‐Potential Porphyrin Photosensitizer". Germany. https://doi.org/10.1002/cssc.201701693.
@article{osti_1402095,
title = {Optimization of Photoanodes for Photocatalytic Water Oxidation by Combining a Heterogenized Iridium Water‐Oxidation Catalyst with a High‐Potential Porphyrin Photosensitizer},
author = {Materna, Kelly L. and Jiang, Jianbing and Regan, Kevin P. and Schmuttenmaer, Charles A. and Crabtree, Robert H. and Brudvig, Gary W.},
abstractNote = {Abstract The development of water‐splitting dye‐sensitized photoelectrochemical cells has gained interest owing to their ability to generate renewable fuels from solar energy. In this study, photoanodes were assembled from a SnO 2 film sensitized with a combination of a high‐potential CF 3 ‐substituted porphyrin dye with a tetrahydropyranyl‐protected hydroxamic acid surface‐anchoring group and a Cp*Ir (Cp*=pentamethylcyclopentadienyl) water‐oxidation catalyst containing a silatrane anchoring group. The dye/catalyst ratios were varied from 2:1 to 32:1 to optimize the photocatalytic water oxidation. Photoelectrochemical measurements showed not only more stable and reproducible photocurrents for lower dye/catalyst ratios but also improved photostability. O 2 production was confirmed in real time over a 20 h period with a Clark electrode. Photoanodes prepared from 2:1 and 8:1 dye/catalyst sensitization solutions provided the most active electrodes for photocatalytic water oxidation and performed approximately 30–35 turnovers in 20 h.},
doi = {10.1002/cssc.201701693},
journal = {ChemSusChem},
number = 22,
volume = 10,
place = {Germany},
year = {Mon Oct 23 00:00:00 EDT 2017},
month = {Mon Oct 23 00:00:00 EDT 2017}
}
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