Integrated photosystem II-based photo-bioelectrochemical cells

Omer Yehezkeli, Ran Tel-Vered, Julian Wasserman, Alexander Trifonov, Dorit Michaeli, Rachel Nechushtai and Itamar Willner ()
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Omer Yehezkeli: Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem
Ran Tel-Vered: Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem
Julian Wasserman: Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem
Alexander Trifonov: Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem
Dorit Michaeli: The Silberman Institute of Life Sciences, The Minerva Center for Bio-Hybrid Complex Systems, The Hebrew University of Jerusalem
Rachel Nechushtai: The Silberman Institute of Life Sciences, The Minerva Center for Bio-Hybrid Complex Systems, The Hebrew University of Jerusalem
Itamar Willner: Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem

Nature Communications, 2012, vol. 3, issue 1, 1-7

Abstract: Abstract Photosynthesis is a sustainable process that converts light energy into chemical energy. Substantial research efforts are directed towards the application of the photosynthetic reaction centres, photosystems I and II, as active components for the light-induced generation of electrical power or fuel products. Nonetheless, no integrated photo-bioelectrochemical device that produces electrical power, upon irradiation of an aqueous solution that includes two inter-connected electrodes is known. Here we report the assembly of photobiofuel cells that generate electricity upon irradiation of biomaterial-functionalized electrodes in aqueous solutions. The cells are composed of electrically contacted photosystem II-functionalized photoanodes and an electrically wired bilirubin oxidase/carbon nanotubes-modified cathode. Illumination of the photoanodes yields the oxidation of water to O2 and the transfer of electrons through the external circuit to the cathode, where O2 is re-reduced to water.

Date: 2012
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DOI: 10.1038/ncomms1741

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