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Flavins Secreted by Bacterial Cells of Shewanella Catalyze Cathodic Oxygen Reduction

Authors

  • Dr. Huan Liu,

    1. Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, BeiHang University, Beijing 100191 (PR China)
    2. ERATO/JST, HASHIMOTO Light Energy Conversion Project, 4-6-1 Komaba, Meguro-ku,Tokyo 153-8904(Japan), Fax: (+81) 3-5452-5768
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  • Shoichi Matsuda,

    1. Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-9656 (Japan)
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  • Prof. Kazuhito Hashimoto,

    Corresponding author
    1. ERATO/JST, HASHIMOTO Light Energy Conversion Project, 4-6-1 Komaba, Meguro-ku,Tokyo 153-8904(Japan), Fax: (+81) 3-5452-5768
    2. Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-9656 (Japan)
    3. Research Centre of Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904 (Japan)
    • ERATO/JST, HASHIMOTO Light Energy Conversion Project, 4-6-1 Komaba, Meguro-ku,Tokyo 153-8904(Japan), Fax: (+81) 3-5452-5768
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  • Dr. Shuji Nakanishi

    Corresponding author
    1. ERATO/JST, HASHIMOTO Light Energy Conversion Project, 4-6-1 Komaba, Meguro-ku,Tokyo 153-8904(Japan), Fax: (+81) 3-5452-5768
    2. Research Centre of Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904 (Japan)
    • ERATO/JST, HASHIMOTO Light Energy Conversion Project, 4-6-1 Komaba, Meguro-ku,Tokyo 153-8904(Japan), Fax: (+81) 3-5452-5768
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Abstract

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On Her Majesty′s Secrete Service: Oxygen reduction is an important process for microbial fuel cells (MFCs) and microbiologically-influenced corrosion (MIC). We demonstrate that flavins secreted by anode-respiring Shewanella cells can catalyze cathodic oxygen reduction via adsorption on the cathode. The findings will provide new insight for developing methods to improve MFC performance and to prevent MIC.

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