Bioelectrochemical anode reactions

Bioelectrochemical Hydrogen Production, Fig.1 Schematic layout of a microbial electrolysis cell (MEC) showing the anode and cathode chamber, the electrodes with attached biocatalysts, the membrane separator and the power supply, as well as the anodic and cathodic half reactions. AEM anion exchange membrane, CEM cation exchange membrane... 

A bioelectrochemical system (BES) is an electrochemical device used to convert electrical energy into chemical energy and vice versa. A BES consists of an anode and a cathode compartment, often separated by an ion-selective membrane. The anode is the site of the oxidation reaction which liberates electrons to the electrode and protons to the electrolyte the cathode is the site of the reduction reaction, which consumes the electrons to reduce a final electron acceptor. To maintain electroneutrality of the system, protons (or other cations) need to migrate to the cathode through the ion-selective membrane. Depending on the half-cell potentials of the electrodes, a BES can be operated either as a microbial fuel cell (MFC), in which electric energy is generated, or as a microbial... 

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