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Aslan, S,Conghaile, PO,Leech, D,Gorton, L,Timur, S,Anik, U
Development of an Osmium Redox Polymer Mediated Bioanode and Examination of its Performance in Gluconobacter oxydans Based Microbial Fuel Cell
WOS: 6 ()
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microbial biofuel cell osmium redox polymer Gluconobacter oxydans Glassy carbon paste electrodes SHEWANELLA-ONEIDENSIS MR-1 DIRECT ELECTRON-TRANSFER BIOSENSORS BACTERIA EFFICIENCY COMPLEXES TRANSPORT GLYCEROL GLUCOSE
Gluconobacter oxydans (G. oxydans) cells together with an osmium redox polymer (ORP) [Osmium (2,2'-bipyridine) 2(poly-vinylimidazole) 10Cl] Cl were combined with a glassy carbon paste electrode (GCPE) to form a bioanode for a microbial fuel cell (MFC) based on G. oxydans. Although there are G. oxydans/ORP combined bioanode in the literature, as far as it is known, this system is the first one where G. oxydans/ORP bioanode is combined with a cathode and a MFC is formed. After the optimization of experimental parameters, analytical characteristics of ORP/G. oxydans/GCPE bioanode were investigated. ORP/G. oxydans/GCPE showed two linear ranges for ethanol substrate as 1.0-30 mM (R-2 = 0.902) and 30-500 mM (R-2 = 0.997) and analytical range as 1.0-1000 mM. Limit of detection (3.0 s/m) and limit of quantification (10 s/m) values were calculated as 1.29 mM and 4.30 mM respectively where the RSD value was 1.16% for n=5. Combining the developed bioanode in the presence of 5.0 mM K3Fe(CN) 6 mediator with a Pt wire cathode a double compartment MFC was obtained via a salt bridge. G. oxydans/GCPE bioanode based MFC had maximum power density of 0.133 mW cm(-2) (at 33.5 mV), maximum current density as 8.73 mA cm(-2) and OCP value of 156 mV. On the other hand, ORP/G. oxydans/GCPE based MFC showed maximum power density as 0.26 mW cm(-2) (at 46.8 mV), maximum current density as 15.079 mA cm(-2) and OCP value of 176 mV.
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