Question

Graphitic biochar as a cathode electrocatalyst support for microbial fuel cells.

Answer 1

A microbial fuel cell (MFC), or biological fuel cell, is a bio-electrochemical system[1] that drives an electric current by using bacteriaand mimicking bacterial interactions found in nature. MFCs can be grouped into two general categories: mediated and unmediated. The first MFCs, demonstrated in the early 20th century, used a mediator: a chemical that transfers electrons from the bacteria in the cell to the anode. Unmediated MFCs emerged in the 1970s; in this type of MFC the bacteria typically have electrochemically active redoxproteins such as cytochromes on their outer membrane that can transfer electrons directly to the anode.[2][3] In the 21st century MFCs started to find a commercial use in wastewater treatment.[4]