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A biofuel cell with enhanced power output by grape juice

Authors
Journal
Electrochemistry Communications
1388-2481
Publisher
Elsevier
Publication Date
Volume
9
Issue
7
Identifiers
DOI: 10.1016/j.elecom.2007.01.055
Keywords
  • Biofuel Cells
  • Glucose
  • Grape Juice
  • Power Output
  • Ionic Liquid
  • Carbon Nanotube
Disciplines
  • Biology

Abstract

Abstract Glucose oxidase and laccase immobilized at multiwalled carbon nanotubes-ionic liquid gel modified electrodes are used as the catalysts of anode and cathode of biofuel cells (BFCs), respectively. The BFC based on glucose and air is proposed. When ferrocene monocarboxylic acid is adopted as the mediator of anode, the power output of the BFC is ca. 4.1 μW (power density ca. 10.0 μW cm −2), which is higher than the value of 2.7 μW (power density ca. 6.6 μW cm −2) by taking ferrocene dicarboxylic acid as the mediator. This implies that the mediator with formal potential closing to that of the enzyme does improve the power output. Furthermore, the power output of the BFC is greatly improved by taking grape juice as the fuel of anode rather than glucose. This system also indicates that grape juice as a fuel of the BFC not only is feasible and can also enhances the power output of the BFCs. Besides, it greatly lowers the cost and simplifies the preparation procedure of the BFCs, making the BFC towards “green” bioenergy.

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