I find the interaction between microorganisms and electrodes a very fascinating one, and this interaction forms the basis of the rapidly growing research field of "Microbial Electrochemical Technologies".
All these Microbial Electrochemical Technologies have in common that microorganisms act as a catalyst on an electrode, where they enable many different types of reactions. Examples are the recovery of electricity from wastewater, the production of hydrogen from wastewater, bioremediation, metal recovery, and production of chemicals and fuels from electricity and CO2.
The field of Microbial Electrochemical Technologies is very diverse, connecting researchers in the field of biotechnology, process engineering, microbiology, electrochemistry, and others.
For more information on Microbial Electrochemical Technologies, see the ISMET website.