“…Low conversion rates and productivities are a problem in many reported cases (Hintermayer, Yu, Krömer, & Weuster‐Botz, ; Jeon et al, ; Lai, Yu, et al, 2016; Nevin, Woodard, Franks, Summers, & Lovley, ), highlighting the necessity to improve the electron transfer rate. Currently, the main focus is on optimizing electrode materials and surfaces to increase current densities (Chen & Xue, ; Pocaznoi, Calmet, Etcheverry, Erable, & Bergel, ; Rabaey et al, ; Zhang et al, ), but the move toward new organisms that are accessible for metabolic engineering also enables us to improve the current density by changing the number of redox active enzymes on the cell surface.…”