TY - GEN
T1 - Bioinspired energy conversion schemes
AU - Moore, Ana
AU - Moore, Gary
AU - Hambourger, Michael
AU - Kodis, Gerdenis
AU - Gervaldo, Miguel
AU - Liddell, Paul A.
AU - Gust, Devens
AU - Moore, Thomas
PY - 2007
Y1 - 2007
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.
AB - 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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M3 - Conference contribution
AN - SCOPUS:37349107853
SN - 084127438X
SN - 9780841274389
T3 - ACS National Meeting Book of Abstracts
BT - 233rd ACS National Meeting, Abstracts of Scientific Papers
T2 - 233rd ACS National Meeting
Y2 - 25 March 2007 through 29 March 2007
ER -