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Increase of Electrical Properties using a Novel Mixed Buffer System in an Enzyme Fuel Cell

Authors
Lee, Jin YoungShin, Hyun YongKang, Seong WooPark, ChulhwanOh, Kyeong KeunKim, Seung Wook
Issue Date
11월-2009
Publisher
KOREAN SOC BIOTECHNOLOGY & BIOENGINEERING
Keywords
microperoxidase-11; Phosphate buffer; 3-Morpholinopropanesulfonic acid buffer; enzymatic fuel cell; biocatalysts
Citation
BIOTECHNOLOGY AND BIOPROCESS ENGINEERING, v.14, no.6, pp.687 - 693
Indexed
SCIE
SCOPUS
KCI
Journal Title
BIOTECHNOLOGY AND BIOPROCESS ENGINEERING
Volume
14
Number
6
Start Page
687
End Page
693
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/118993
DOI
10.1007/s12257-008-0229-7
ISSN
1226-8372
Abstract
Environment-friendly biocatalytic energy is considered to represent an attractive alternative to chemical catalyst-based cells due to its renewability and better operation at low temperature. However, electrical biocatalysts have a low activity and electrical power. For increasing electrical properties of biocatalyst, a novel mixed buffer (phosphate and 3-morpholinopropanesulfonic acid (MOPS)) system was applied to an enzyme-based biofuel cell with microperoxidase (MP-11)-modified Au electrode. The cathodic electrical properties were increased by the phosphate and MOPS-mixed buffer solution. It was identified that the novel mixed buffer system obtained stronger ionic strength from phosphate buffer and better enzyme activity from MOPS buffer. The highest results of cyclic voltammetry were obtained when the proportion of phosphate to MOPS was nearly 1:1 and the pH was 7.0-7.3. In addition, the novel mixed buffer led to the maximum power density (ca. 62.7 mu W/cm(2)) in a basic enzymatic fuel cell (EFC). (C) KSBB
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