Cover Picture: Overcoming Bottlenecks of Enzymatic Biofuel Cell Cathodes: Crude Fungal Culture Supernatant Can Help to Extend Lifetime and Reduce Cost (ChemSusChem 7/2013)

Authors

  • Sabine Sané,

    1. Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg (Germany)
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  • Prof. Dr. Claude Jolivalt,

    1. Laboratoire Charles Friedel, Chimie ParisTech ENSCP, CNRS, UMR 7223, 75005 Paris (France)
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  • Dr. Gerhard Mittler,

    1. Department of Molecular Immunology, Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg (Germany)
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  • Dr. Peter J. Nielsen,

    1. Department of Molecular Immunology, Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg (Germany)
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  • Stefanie Rubenwolf,

    1. Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg (Germany)
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  • Prof. Dr. Roland Zengerle,

    1. Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg (Germany)
    2. BIOSS—Centre for Biological Signalling Studies, University of Freiburg, 79110 Freiburg (Germany)
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  • Dr. Sven Kerzenmacher

    Corresponding author
    1. Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg (Germany)
    • Laboratory for MEMS Applications, IMTEK - Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg (Germany)

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Abstract

original image

The cover image shows the wood-degrading fungus Trametes versicolor that naturally secretes the redox-enzyme laccase. Without further enzyme purification, the laccase-containing culture supernatant can be supplied to an enzymatic biofuel cell cathode, at which it catalyzes the oxygen reduction reaction. Kerzenmacher et al. show in their manuscript on page 1209 that the enzymes lose catalytic activity with time; for this reason, fresh culture supernatant is regularly resupplied to the electrode to replace the deactivated laccase enzymes. In this way, a comparably simple and cost-efficient enzymatic biofuel cell cathode with an extended lifetime can be established.

Cartoon 1.

Ancillary