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Freely-suspended, single chamber glucose oxidase-laccase enzymatic fuel cell

Asrul, Nurrisa and Othman, Raihan and Yahya, Muhd Zu Azhan and Mohd. Salleh, Hamzah and Yusof, Faridah and Ahmad, Abdul Aziz (2012) Freely-suspended, single chamber glucose oxidase-laccase enzymatic fuel cell. Advanced Materials Research, 512/15. pp. 1499-1502. ISSN 1022-6680

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Abstract

We investigate glucose oxidase-laccase EFC employing simplified system design – freely suspended enzymes in a membraneless, single chamber cell. The highly specific enzyme reaction mechanisms permit such system design. The EFC comprises nickel mesh as the oxidative current collector and a carbon-based air electrode as the reductive current collector, enclosed in acrylic casing of 3 ml volumetric capacity. The air electrode also serves as the ambient oxygen diffusion site to continuously feed oxygen into the system. The anolyte consists of glucose oxidase enzyme (10 U), glucose substrate (200 mM) and FAD co-enzyme (3.8 mM), while the catholyte consists of laccase enzyme (10 U) and syringaldazine substrate (216 µM). The cell employing citrate buffer electrolyte of pH 5 exhibits the best characteristics i.e. an open circuit voltage (OCV) around 960 mV and able to sustain continuous discharge current of 30µA for about 31.75 hours. The cell possesses volumetric power density of 286 microwatt/cm3 which is considered comparable to biocatalytic energy systems employing much more complicated design.

Item Type: Article (Journal)
Additional Information: 2593/24233
Uncontrolled Keywords: Enzymatic Fuel Cell (EFC), Biofuel cell (BFC), Laccase, Glucose oxidase, Single chamber, Freely-suspended enzymes
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ807 Renewable energy sources
T Technology > TP Chemical technology > TP248.13 Biotechnology
T Technology > TP Chemical technology > TP250 Industrial electrochemistry
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Science
Depositing User: Raihan Othman
Date Deposited: 11 Jun 2012 09:03
Last Modified: 21 Jun 2012 14:45
URI: http://irep.iium.edu.my/id/eprint/24233

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