Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 8, Issue 5, Pages 869-873Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2006.03.025
Keywords
microbial fuel cells; biohydrogen; biofuel cells; Clostridium; consortia; soil
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Bacterial communities from heat treated soils are shown to be convenient and versatile biocatalysts for hydrogen mediated microbial electricity generation. The isolation of spore forming species by heat pre-treatment allows the growth of robust hydrogen producing bacterial consortia with which electricity can be generated from a large variety of substrates, including complex carbohydrates. The fermentative hydrogen is efficiently oxidized in the microbial medium at electrocatalytic electrodes coated with platinum-poly(tetrafluoraniline) bilayer (Pt-PTFA) composites. Coulombic yields up to 30% with respect to the maximum biological hydrogen yield of 4 moles H-2/glucose unit, and maximum current densities of 170-200 mA L-1 were achieved by using chronoamperometric batch and semi-batch experiments. (c) 2006 Elsevier B.V. All rights reserved.
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