Ethanol

Monopotassium phosphate, sodium hydroxide, sodium chloride, anhydrous acetic acid, d-glucose, glutaraldehyde (Mosreaktiv, Moscow, Russia); bovine serum albumin (fraction V, protease-free) (ICN Biomedicals Inc., Maumee, OH, USA), 2,6-dichlorophenolindophenol sodium salt, chitosan (low molecular weight), Nafion 117 (5% solution), PEDOT:PSS (1.3 wt % dispersion in H₂O), bacteriological agar, potassium ferricyanide (Merck, Burlington, MA, USA); ethanol, sorbitol, yeast extract, and potassium chloride (Dia-M, Moscow, Russia) were used. Three-contact screen-printed carbon electrodes were purchased from Color Electronics (Moscow, Russia) and were used as electrodes in biosensors. The working electrode was 3 mm in diameter and was surrounded by a graphite auxiliary electrode and a silver reference electrode. Thermally expanded graphite (TEG) synthesized as described in [28 (link)] was used as a basis for the working electrodes of MFCs.

Monopotassium phosphate, sodium hydroxide, sodium chloride, anhydrous acetic acid, D-glucose (Mosreaktiv, Moscow, Russia); 2,6-dichlorophenolindophenol sodium salt dihydrate, Nafion 117 (5% solution), graphene/PEDOT:PSS hybrid ink, bacteriological agar, potassium ferricyanide (Sigma, Burlington, MA, USA); ethanol, glycerol, sorbitol, yeast extract and potassium chloride (Dia-M, Moscow, Russia) were used. Graphite electrodes (S-3M, OOO Poliprof-L, Moscow, Russia) served as working electrodes