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Keywords:

  • biochemistry;
  • electrochemistry;
  • fuel cells;
  • microbiology;
  • redox chemistry
Thumbnail image of graphical abstract

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.