Towards biochemical fuel cells |
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Authors: | H M Sonawat Ratna S Phadke and Girjesh Govil |
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Institution: | (1) Biochemical Fuel Cell Project, Tata Institute of Fundamental Research, Homi Bhabha Road, 400 005 Bombay, India |
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Abstract: | A biochemical fuel cell is a device which converts chemical energy into electrical power. The catalysts used in this process
can be either inorganic or organic type giving rise to ‘inorganic fuel cells’ or ‘biochemical fuel cells’, respectively. Biochemical
fuel cells use either micro-organism or enzymes as active components to carry out electrochemical reactions. The efficiency
of such a device theoretically can be as high as 90%. The difficulty in attaining these values arises due to sluggishness of electron transfer from active site to conducting electrode.
This can be overcome by using mediators or by immobilizing active components on conducting electrode. We have immobilizedfad-glucose oxidase on a graphite electrode using a semiconducting chain as a bridge. At the present stage of development, such
a device tacks high current densities, which is essential for commercial power generation but can be used in applications
such as pacemakers and glucose sensors. |
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Keywords: | Biochemical fuel cell enzyme-coenzyme system immobilization modified electrode cyclic voltametry |
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