Improvement of a direct electron transfer-type fructose/dioxygen biofuel cell with a substrate-modified biocathode

2014 ◽  
Vol 16 (10) ◽  
pp. 4823 ◽  
Author(s):  
Keisei So ◽  
Shota Kawai ◽  
Yasuyuki Hamano ◽  
Yuki Kitazumi ◽  
Osamu Shirai ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Direct Electron Transfer ◽  
Biofuel Cell

scholarly journals A Direct Electron Transfer-Based Glucose/Oxygen Biofuel Cell Operating in Human Serum

Fuel Cells ◽  
2009 ◽  
pp. NA-NA ◽  
Author(s):  
V. Coman ◽  
R. Ludwig ◽  
W. Harreither ◽  
D. Haltrich ◽  
L. Gorton ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Human Serum ◽  
Direct Electron Transfer ◽  
Biofuel Cell

scholarly journals Enhancement of Electrochemical Performance of Bilirubin Oxidase Modified Gas Diffusion Biocathode by Porphyrin Precursor

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Erica Pinchon ◽  
Mary Arugula ◽  
Kapil Pant ◽  
Sameer Singhal
Keyword(s):  
Electron Transfer ◽  
Oxygen Reduction ◽  
Power Density ◽  
Current Density ◽  
Direct Electron Transfer ◽  
Glucose Dehydrogenase ◽  
Phosphate Buffer Solution ◽  
Gas Diffusion ◽  
Biofuel Cell ◽  
Bilirubin Oxidase

Recent studies have focused on tailoring the catalytic currents of multicopper oxidase (MCO) enzymes-based biocathodes to enhance oxygen reduction. Biocathodes modified with natural substrates specific for MCO enzymes demonstrated drastic improvement for oxygen reduction. Performance of 1-pyrenebutanoic acid, succinimidyl ester (PBSE), and 2,5-dimethyl-1-phenyl-1H-pyrrole-3-carbaldehyde (Di-Carb) oriented bilirubin oxidase (BOx) modified gas diffusion biocathode has been highly improved by incorporating hematin, a porphyrin precursor as electron transfer enhancement moiety. Hematin modified electrodes demonstrated direct electron transfer reaction of BOx exhibiting larger O2 reduction in current density in phosphate buffer solution (pH 7.0) without the need of a mediator. A remarkable improvement in the catalytic currents with 2.5-fold increase compared to non-hematin modified oriented BOx electrodes was achieved. Moreover, a mediatorless and compartmentless glucose/O2 biofuel cell based on DET-type bioelectrocatalysis via the BOx cathode and the glucose dehydrogenase (GDH) anode demonstrated peak power densities of 1 mW/cm2 at pH 7.0 with 100 mM glucose/10 mM NAD fuel. The maximum current density of 1.6 mA/cm2 and the maximum power density of 0.4 mW/cm2 were achieved at 300 mV with nonmodified BOx cathode, while 3.5 mA/cm2 and 1.1 mW/cm2 of current and power density were achieved with hematin modified cathode. The performance improved 2.4 times which attributes to the hematin acting as a natural precursor and activator for BOx activity enhancement.

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