The cathode reaction is one of the most important limiting factors in bioelectrochemical
systems even with precious metal catalysts. Since aerobic bacteria have a much higher
affinity for oxygen than any known abiotic cathode catalysts, the performance of a microbial
fuel cell can be improved through the use of electrochemically-active oxygen-reducing
bacteria acting as the cathode catalyst. These consume electrons available from the
electrode to reduce the electron acceptors present, probably conserving energy for growth …

The cathode reaction is one of the most important limiting factors in bioelectrochemical
systems even with precious metal catalysts. Since aerobic bacteria have a much higher
affinity for oxygen than any known abiotic cathode catalysts, the performance of a microbial
fuel cell can be improved through the use of electrochemically-active oxygen-reducing
bacteria acting as the cathode catalyst. These consume electrons available from the
electrode to reduce the electron acceptors present, probably conserving energy for growth …