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Osadebe, I,Leech, D
2014
November
Chemelectrochem
Effect of Multi-Walled Carbon Nanotubes on Glucose Oxidation by Glucose Oxidase or a Flavin-Dependent Glucose Dehydrogenase in Redox-Polymer-Mediated Enzymatic Fuel Cell Anodes
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fuel cells carbon nanotubes enzymatic electrodes glucose oxidation redox chemistry BIOFUEL CELLS ELECTRON-TRANSFER RECENT PROGRESS BIOSENSORS LACCASE REDUCTION COMPLEXES DEVICES CATHODE ENZYMES
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1988
1993
The addition of multi-walled carbon nanotubes (MWCNTs) to enzymatic electrodes based on either glucose oxidase (GOx), or an oxygen-insensitive flavin adenine dinucleotide-dependent glucose dehydrogenase (FADGDH), increases the amount of {Os(4,4-dimethyl-2,2-bipyridine)(2)[poly(vinylimidazole)](10)Cl}Cl redox polymer at the electrode surface, indicating that MWCNTs provide a surface for the immobilisation of film components. Glucose oxidation is highest for films with 68% (w/w) MWCNTs, and a decrease is observed with larger amounts; this decrease is related to a decrease in retained enzyme activity. Enzymatic electrodes provide 4.2mAcm(-2) current density at 0.12V versus Ag/AgCl, for GOx-based electrodes, compared to 2.7mAcm(-2) for FADGDH-based electrodes in 50mM phosphate-buffered saline containing 150mM NaCl at 37 degrees C. Current densities of 0.52 and 1.1mAcm(-2) are obtained for FADGDH and GOx-based electrodes, respectively, operating at physiologically relevant 5mM glucose concentrations. These enzymatic electrodes, thus, show promise for application as anodes in enzymatic fuel cells for invivo or exvivo power generation.
10.1002/celc.201402136
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