We report a direct one-step method to chemically graft metalloporphyrins to a visible-light-absorbing gallium phosphide semiconductor with the aim of constructing an integrated photocathode for light activating chemical transformations that include capturing, converting, and storing solar energy as fuels. Structural characterization of the hybrid assemblies is achieved using surface-sensitive spectroscopic methods, and functional performance for photoinduced hydrogen production is demonstrated via three-electrode electrochemical testing combined with photoproduct analysis using gas chromatography. Measurements of the total per geometric area porphyrin surface loadings using a cobalt-porphyrin based assembly indicate a turnover frequency ≥3.9 H2 molecules per site per second, representing the highest reported to date for a molecular-catalyst-modified semiconductor photoelectrode operating at the H+/H2 equilibrium potential under 1-sun illumination.
Details
- Metalloporphyrin-Modified Semiconductors for Solar Fuel Production
- Khusnutdinova, Diana (Author)
- Beiler, Anna (Author)
- Wadsworth, Brian (Author)
- Jacob, S. I. (Author)
- Moore, Gary (Author)
- College of Liberal Arts and Sciences (Contributor)
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Digital object identifier: 10.1039/C6SC02664H
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Identifier TypeInternational standard serial numberIdentifier Value2041-6520
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Identifier TypeInternational standard serial numberIdentifier Value2041-6539
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The final version of this article, as published in Chemical Science, can be viewed online at: http://pubs.rsc.org/en/Content/ArticleLanding/2017/SC/C6SC02664H#!divAbstract
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Khusnutdinova, D., Beiler, A. M., Wadsworth, B. L., Jacob, S. I., & Moore, G. F. (2017). Metalloporphyrin-modified semiconductors for solar fuel production. Chemical Science, 8(1), 253-259. doi:10.1039/c6sc02664h