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Design of Experiments Approach to Provide Enhanced Glucose-oxidising Enzyme Electrode for Membrane-less Enzymatic Fuel Cells Operating in Human Physiological Fluids

Graphite electrodes are modified with a redox polymer, [Os(4,4′-dimethoxy-2,2′-bipyridine)2(polyvinylimidazole)10Cl]+ (E°′=−0.02 V vs Ag/AgCl (3 M KCl), crosslinked with a flavin adenine dinucleotide glucose dehydrogenase and multi-walled carbon nanotubes for electrocatalytic oxidation of glucose. T... Full description

Contained in: Electroanalysis Vol. 30, No. 7 (2018), p. 1438-1445
Fulltext access:
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Links: Additional Link (dx.doi.org)
ISSN: 1521-4109
Additional Keywords: BILIRUBIN
BLUTPLASMA
BRENNSTOFFZELLE
DEHYDROGENASE
ENERGIEERZEUGUNG
ENZYM
ENZYMBRENNSTOFFZELLE
ENZYMELEKTRODE
GRAPHITELEKTRODE
KATHODE
MEHRWANDIGES-KOHLENSTOFFNANOROEHRCHEN
MENSCH
OXIDASEN
OXIDATIONSREAKTION
POLYMER
SAUERSTOFF
TRAUBENZUCKER
DOI: 10.1002/elan.201600402
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 8 Seiten, 7 Bilder, 4 Tabellen, 46 Quellen
ID (e.g. DOI, URN): 10.1002/elan.201600402
PPN (Catalogue-ID): WTI060588411
Note: WTI TEMA DB
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520 |a Graphite electrodes are modified with a redox polymer, [Os(4,4′-dimethoxy-2,2′-bipyridine)2(polyvinylimidazole)10Cl]+ (E°′=−0.02 V vs Ag/AgCl (3 M KCl), crosslinked with a flavin adenine dinucleotide glucose dehydrogenase and multi-walled carbon nanotubes for electrocatalytic oxidation of glucose. The enzyme electrodes provide 52% higher current density, 1.22±0.10 mA cm−2 in 50 mM phosphate-buffered saline at 37 °C containing 5 mM glucose, when component amounts are optimised using a design of experiments approach compared to one-factor-at-a-time. Current densities of 0.84±0.15 mA cm−2 were achieved in the presence of oxygen for these enzyme electrodes. Further analysis of the model allowed for altering of the electrode components while maintaining similar current densities, 0.78±0.11 mA cm−2 with 34% less enzyme. Application of the cost-effective anodes in membrane-less enzymatic fuel cells is demonstrated by connection to cathodes prepared by co-immobilisation of [Os(2,2′-bipyridine)2(polyvinylimidazole)10Cl+] redox polymer, Myrothecium verrucaria bilirubin oxidase and multi-walled carbon nanotubes on graphite electrodes. Power densities of up to 285 µW cm−2, 146 µW cm−2 and 60 µW cm−2 are achieved in pseudo-physiological buffer, artificial plasma and human plasma respectively, showing promise for in vivo or ex vivo power generation under these conditions. [Copyright Wiley-VCH Verlag GmbH & Co. KGaA. Reproduced with permission.] 
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