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Summary


Title : Biofuel cells using enzyme-based bioanode and biocathode

In order to improve the performance of the enzyme biofuel cell, the performance was evaluated by dividing it into an anode and a cathode. On the cathode, Laccase was used to promote the oxygen reduction r...

Summary


Title : Biofuel cells using enzyme-based bioanode and biocathode

In order to improve the performance of the enzyme biofuel cell, the performance was evaluated by dividing it into an anode and a cathode. On the cathode, Laccase was used to promote the oxygen reduction reaction. A gold nanoparticle-naphthalene thiol bond was formed through the combination of gold nanoparticles and naphthalene thiols, which helped to transfer electrons from carbon nanotubes to laccase. By using polyethyleneimine, a larger amount of laccase and gold nanoparticle-naphthalene thiol complexes could be immobilized on carbon nanotubes. The starting point of the reaction and rate of oxygen reduction reaction was improved by adsorption of the polyethyleneimine and the gold nanoparticle - naphthalene thiol complex, which is confirmed by the Cyclic voltammetry(CV). Using the above structure, the maximum current density of 13 μW·cm-2 was obtained. In the anode, glucose oxidase was used to promote the glucose oxidation reaction. Glucose oxidase was immobilized on carbon nanotubes using polyethyleneimine, and methyl red was also immobilized as a mediator. Optimized concentration of methyl red and glucose oxidase lead to improve overall glucose oxidation reaction. In addition, anodic reaction effect of this catalyst is verified by the performance evaluations of “with membrane” and “without membrane” enzymatic biofuel cells (EBCs). The performance of the catalyst is 0.59mW·cm-2 with the membrane and 0.086mW·cm-2 without membrane. This proves that the catalyst is an excellent catalyst for improving the oxidation reaction rate and the performance of the enzyme biofuel cell.

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