Special Issue: “Microbial fuel cell: From fundamentals to applications”: Guest Editors note

The Special Section “Microbial fuel cells: From fundamentals to applications” covers many diverse and multidisciplinary aspects of the entire microbial electrochemical field, with a special emphasis on microbial and abiotic/microbial electron transfer mechanisms at the anode and cathode electrodes. New materials are presented as low-cost catalysts for oxygen reduction or H2 evolution reactions, as alternatives to exotic/expensive metals. Different anode materials, structures, and configurations are shown with impressive results. Anodic biofilms have been identified and extensively studied, as well as newspecies and mixed-culture biofilms. Innovative designs and working conditions of microbial electrolytic cells for H2 production or NH3 recovery with outstanding results are also presented.