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A quinhydrone biofuel cell based on an enzyme-induced pH gradient
- Source :
- Journal of Power Sources, Journal of Power Sources, Elsevier, 2010, 196 (3), pp.1329-1332. ⟨10.1016/j.jpowsour.2010.08.076⟩
- Publication Year :
- 2011
- Publisher :
- Elsevier BV, 2011.
-
Abstract
- International audience; We report on an alternative concept of biofuelcell functioning based on the unconventional use of enzymes to create apH difference generating a potential difference between electrodes soaked in quinhydrone solutions. The electrode and quinhydrone solution were confined in a dialysis bag placed into a compartment containing either glucose oxidase and catalase for the biocathode or urease for the bioanode. In presence of 0.4 mol L−1 glucose and urea, the enzyme reactions generate apH difference of 3.55, both compartments being separated by an agar-agar wall. The resulting biofuelcell exhibits an open-circuit voltage and maximum power of 208 mV and 30.6 μW, respectively, without immobilization and electrical connection of the involved enzymes. In addition, this biofuelcell was able to provide continuously10 μA during 23 h, producing 0.133 J and 0.828 C. A similar biofuelcell configuration based only on dialysis bags was also developed. A graphite disk electrode elaborated by mechanical compression of graphite particles and quinhydrone, was placed in a dialysis bag itself confined into another dialysis bag containing enzyme solution. The resulting power and open-circuit voltage at saturating substrate conditions are 7.6 μW and 157 mV, respectively.
- Subjects :
- Urease
Inorganic chemistry
Energy Engineering and Power Technology
02 engineering and technology
010402 general chemistry
7. Clean energy
01 natural sciences
Dialysis tubing
chemistry.chemical_compound
Quinhydrone electrode
PIEnergie
[CHIM]Chemical Sciences
Glucose oxidase
Quinhydrone
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
biology
Renewable Energy, Sustainability and the Environment
Chemistry
Graphite disk
Substrate (chemistry)
021001 nanoscience & nanotechnology
6. Clean water
0104 chemical sciences
Biofuelcell
Electrode
biology.protein
Urea
0210 nano-technology
Dialysis (biochemistry)
Subjects
Details
- ISSN :
- 03787753 and 18732755
- Volume :
- 196
- Database :
- OpenAIRE
- Journal :
- Journal of Power Sources
- Accession number :
- edsair.doi.dedup.....3c316467b716a3e691f4e1e159367f9a