Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 28, Pages 10772-10775Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.01.050
Keywords
Lactate; Biofuel cell; Krebs cycle; Bioanode
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Lactate/lactic acid has been considered as a biofuel for enzymatic biofuel cells, but only with single enzyme bioanodes containing lactate dehydrogenase. A single enzyme-based bioanode results in the oxidation of lactate to pyruvate, which only allows for 2 of the total of 12 electrons to be harnessed from the lactate leaving the majority of the energy density of the fuel in the oxidized product (pyruvate); thereby, resulting in low energy density biofuel cells. This paper details an enzyme cascade for complete oxidation of lactate immobilized on a bioanode and employed in a lactate/air biofuel cell. This paper shows that complete oxidation of lactate increases the current density and power density of the biofuel cell, in a similar trend as was observed for complete oxidation of pyruvate in an enzymatic biofuel cell. (C) 2011 Elsevier Ltd. All rights reserved.
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