Live cyanobacteria produce photocurrent and hydrogen using both the respiratory and photosynthetic systems.

Autor:	Saper G; The Nancy & Stephen Grand Technion Energy Program (GTEP), Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel., Kallmann D; The Nancy & Stephen Grand Technion Energy Program (GTEP), Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel., Conzuelo F; Analytical Chemistry - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany., Zhao F; Analytical Chemistry - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany., Tóth TN; The Nancy & Stephen Grand Technion Energy Program (GTEP), Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel.; Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel., Liveanu V; Faculty of Biology, Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel., Meir S; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Szymanski J; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel.; Leibniz Institute of Plant Genetics and Crop Research (IPK), Network Analysis and Modelling, OT Gatersleben, 06466, Seeland, Germany., Aharoni A; Department of Plant and Environmental Sciences, The Weizmann Institute of Science, Rehovot, Israel., Schuhmann W; Analytical Chemistry - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstr. 150, 44780, Bochum, Germany., Rothschild A; The Nancy & Stephen Grand Technion Energy Program (GTEP), Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel.; Department of Materials Science and Engineering, Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel., Schuster G; The Nancy & Stephen Grand Technion Energy Program (GTEP), Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel. gadis@technion.ac.il.; Faculty of Biology, Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel. gadis@technion.ac.il., Adir N; The Nancy & Stephen Grand Technion Energy Program (GTEP), Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel. noam@ch.technion.ac.il.; Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, 32000, Haifa, Israel. noam@ch.technion.ac.il.
Jazyk:	angličtina
Zdroj:	Nature communications [Nat Commun] 2018 Jun 04; Vol. 9 (1), pp. 2168. Date of Electronic Publication: 2018 Jun 04.
DOI:	10.1038/s41467-018-04613-x
Abstrakt:	Oxygenic photosynthetic organisms perform solar energy conversion of water and CO 2 to O 2 and sugar at a broad range of wavelengths and light intensities. These cells also metabolize sugars using a respiratory system that functionally overlaps the photosynthetic apparatus. In this study, we describe the harvesting of photocurrent used for hydrogen production from live cyanobacteria. A non-harmful gentle physical treatment of the cyanobacterial cells enables light-driven electron transfer by an endogenous mediator to a graphite electrode in a bio-photoelectrochemical cell, without the addition of sacrificial electron donors or acceptors. We show that the photocurrent is derived from photosystem I and that the electrons originate from carbohydrates digested by the respiratory system. Finally, the current is utilized for hydrogen evolution on the cathode at a bias of 0.65 V. Taken together, we present a bio-photoelectrochemical system where live cyanobacteria produce stable photocurrent that can generate hydrogen.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu