Enzymatic fuel cells based on electrodeposited graphite oxide/cobalt hydroxide/chitosan composite-enzyme electrode

Hee Uk Lee, Hah Young Yoo, Tseveg Lkhagvasuren, Yoon Seok Song, Chulhwan Park, Jungbae Kim, Seung Wook Kim

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Enzymatic fuel cells (EFCs) use redox enzymes with high electron transfer rates that lead to high power density from bioavailable substrates. However, EFCs are limited by the difficult electrical wiring of the enzymes to the electrode. Therefore, deposition of Co(OH)2 onto graphite oxide (GO) was improved for efficient wiring of the enzymes. The GO/Co(OH)2/chitosan composites were electrodeposited for immobilization of glucose oxidase (GOD) or laccase on an Au electrode, respectively. The electrical properties of the bioelectrode according to cyclic voltammetry were improved using GO/Co(OH)2/chitosan composites. The anode and cathode system was composed of GOD and laccase as biocatalysts and glucose/oxygen as substrates under ambient conditions (pH 7.0 and 25°C). The EFC using GO/Co(OH)2/chitosan composites with a mediator delivered a high power density of up to 517±3.3μW/cm2 at 0.46V and open circuit voltage of 0.60V. These results provide a promising direction for further development and application of EFCs.

Original languageEnglish
Pages (from-to)342-348
Number of pages7
JournalBiosensors and Bioelectronics
Volume42
Issue number1
DOIs
Publication statusPublished - 2013 Apr 5

Keywords

  • Cobalt hydroxide
  • Electrodeposition
  • Enzymatic fuel cell
  • Glucose oxidase
  • Graphite oxidation
  • Laccase

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

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