Carbon superfine materials as a promising material for Gluconobacter oxydans based microbial fuel cells

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Tenchurin, Timur K.^1 ; Reshetilov, Anatoly N.^4 ; Plekhanova, Yuliya V.^4 ; Tarasov, Sergey E.^4 ; Bykov, Aleksandr G.^4 ; Gutorov, Michail A.^2 ; Alferov, Sergey V.^3,4 ; Chvalun, Sergei N.^1 ; Orekhov, Anton S.^1 ; Shepelev, Alexey D.^1 ; Gotovtsev, Pavel M.^1 ; Vasilov, Raif G.^1

National Research Center Kurchatov Institute, Moscow

123182, Russia^1

OOO Gamma LLC, Zelenograd, Moscow

124498, Russia^2

Tula State University, Tula

300012, Russia^3

Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Science, Pushchino, Moscow oblast

142290, Russia^4

关键词: Bioelectro-catalysis;    Cellular respiration;    Controlled parameter;    Gluconobacter oxydans;    Orders of magnitude;    Physiological state;    Superfine materials;    Transport characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/2/022005/pdf
DOI  :  10.1088/1755-1315/121/2/022005

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

We have investigated the properties of a several bioelectrodes based on the immobilization of Gluconobacter oxydans bacterial cells on carbon superfine materials (CFMs). We use three types of CFMs (as adopted by the working classification CFM 1-3). All bioelectrodes was formed by covering the surface of the CFM via suspension of bacteria in a chitosan gel. The properties of samples are evaluated by measuring the physiological state of the bacteria immobilized: (a) recording the intensity of cellular respiration, (b) for measuring the charge transport characteristics of electrode (bioelectrocatalysis), and (c) by measuring the electrode impedance. Measurements (b) and (c) are made on two and three-electrode circuits in the oxidation of ethanol in the presence of 2,6-dichlorophenol electron transport mediator. For CFMs 1 and 2 the electron transport by the oxidation of the substrate is not registered, while for CFM 3 the current generation occurs. The resistance of CFM 3 bioelectrode is below the resistance of CFMs 1 and 2 both before (39.6 kΩ/cm2for CFM 3, 630 Ω/cm2for CFM 2, and 1329 Ω/cm2for CFM 1) and after the addition of the substrate (2.9 kΩ/cm2for CFM 3, 45 kΩ/cm2for CFM 2, and 58 kΩ/cm2for CFM 1). The bioelectrode made of CFM 3 has a capacitance of 196 μF/cm2- greater than two orders of magnitude of the bioelectrode capacity of CFMs 1 and 2 (0.51 and 0.58 μF/cm2, respectively). It is important to further study the properties of the CFM class of materials, which are promising as the basis of mechanically flexible electrodes with controlled parameters.