Bioinspired energy conversion schemes

Ana L Moore, Gary F. Moore, Michael Hambourger, Gerdenis Kodis, Miguel Gervaldo, Paul A. Liddell, John Devens Gust, Thomas A Moore

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A hybrid photoelectrochemical cell that oxidizes biomaterials and reduces protons to hydrogen has been developed. Upon excitation of a porphyrin sensitized, Grätzel-type anode electrons are injected into the TiO2 CB, which results in cathodic evolution of hydrogen and formation of the porphyrin radical cation. Electrons to reduce the porphyrin radical cation come from NADH, the coenzyme and substrate-to-electrode mediator which works in conjunction with various dehydrogenase enzymes. Both Pt- and hydrogenase-based catalysts are used to produce hydrogen at the cathode. The design, synthesis, and photoelectrochemical characterization of models for the donor side of PSII will also be presented. These consist of a porphyrin-based model of P680 covalently linked to phenol, modeling tyrosine, and H-bonded to imidazole, modeling histidine. This construct models the TYR/HIS mediator coupling P680 to the water oxidizing unit in PSII. Initial experiments with these compounds as sensitizers for the photoanode will be described.

Original languageEnglish
Title of host publicationACS National Meeting Book of Abstracts
Publication statusPublished - 2007
Event233rd ACS National Meeting - Chicago, IL, United States
Duration: Mar 25 2007Mar 29 2007

Other

Other233rd ACS National Meeting
CountryUnited States
CityChicago, IL
Period3/25/073/29/07

Fingerprint

Porphyrins
Energy conversion
Hydrogen
Cations
Photoelectrochemical cells
Hydrogenase
Electrons
Coenzymes
Biocompatible Materials
Phenol
Histidine
NAD
Tyrosine
Protons
Oxidoreductases
Anodes
Cathodes
Electrodes
Catalysts
Water

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Moore, A. L., Moore, G. F., Hambourger, M., Kodis, G., Gervaldo, M., Liddell, P. A., ... Moore, T. A. (2007). Bioinspired energy conversion schemes. In ACS National Meeting Book of Abstracts

Bioinspired energy conversion schemes. / Moore, Ana L; Moore, Gary F.; Hambourger, Michael; Kodis, Gerdenis; Gervaldo, Miguel; Liddell, Paul A.; Gust, John Devens; Moore, Thomas A.

ACS National Meeting Book of Abstracts. 2007.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Moore, AL, Moore, GF, Hambourger, M, Kodis, G, Gervaldo, M, Liddell, PA, Gust, JD & Moore, TA 2007, Bioinspired energy conversion schemes. in ACS National Meeting Book of Abstracts. 233rd ACS National Meeting, Chicago, IL, United States, 3/25/07.
Moore AL, Moore GF, Hambourger M, Kodis G, Gervaldo M, Liddell PA et al. Bioinspired energy conversion schemes. In ACS National Meeting Book of Abstracts. 2007
Moore, Ana L ; Moore, Gary F. ; Hambourger, Michael ; Kodis, Gerdenis ; Gervaldo, Miguel ; Liddell, Paul A. ; Gust, John Devens ; Moore, Thomas A. / Bioinspired energy conversion schemes. ACS National Meeting Book of Abstracts. 2007.
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N2 - A hybrid photoelectrochemical cell that oxidizes biomaterials and reduces protons to hydrogen has been developed. Upon excitation of a porphyrin sensitized, Grätzel-type anode electrons are injected into the TiO2 CB, which results in cathodic evolution of hydrogen and formation of the porphyrin radical cation. Electrons to reduce the porphyrin radical cation come from NADH, the coenzyme and substrate-to-electrode mediator which works in conjunction with various dehydrogenase enzymes. Both Pt- and hydrogenase-based catalysts are used to produce hydrogen at the cathode. The design, synthesis, and photoelectrochemical characterization of models for the donor side of PSII will also be presented. These consist of a porphyrin-based model of P680 covalently linked to phenol, modeling tyrosine, and H-bonded to imidazole, modeling histidine. This construct models the TYR/HIS mediator coupling P680 to the water oxidizing unit in PSII. Initial experiments with these compounds as sensitizers for the photoanode will be described.

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