Electrospun carbon nanofibers from polyacrylonitrile blended with activated or graphitized carbonaceous materials for improving anodic bioelectrocatalysis

► Activated carbon or graphite was blended in polyacrylonitrile to prepare carbon nanofibers (CNFs). ► Such blends increased specific surface area and porosity in resulting CNFs. ► Bioelectrocatalytic current generation was improved with these CNF electrodes. ► Using such blends in precursors can be a viable strategy for making efficient CNF electrodes.