Improving the power density of a <i>Geobacter</i> consortium‐based microbial fuel cell by incorporating a highly dispersed birnessite/C cathode

Fuentes‐Albarrán, Carmen; Juárez, Katy; Gamboa, S.A.; Tirado, Ana Lilia; Álvarez-Gallegos, Alberto

doi:10.1002/jctb.6495

Cited by 6 publications

(5 citation statements)

References 74 publications

(119 reference statements)

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“…The MFC obtained a maximum peak power of 6.09 mW/m 2 with a current density of 22 mA/m 2 . (Fuentes et al, 2020) used the same method as this study to obtain MnO2. The crystalline structure they identified was birnessite-type MnO2.…”

Section: Polarization Curve and Power Densitymentioning

confidence: 99%

Performance of a microbial fuel cell using MnO2 as cathode catalyst

CALZADO-ARAGÓN,

FUENTES-ALBARRÁN,

ALARCÓN-HERNÁNDEZ

2023

Engineering and Applied Sciences

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Microbial fuel cells are electrochemical devices that use microorganisms as catalysts to produce electricity. Oxygen is the most used electron acceptor in the cathodic reaction of these systems, due to its abundance in the environment and high redox potential; however, the slow kinetics in oxygen reduction constitutes a limitation. Platinum (Pt) is the most widely used catalyst to accelerate the oxygen reduction reaction, but its high cost makes its use on a large scale impossible. In this study, the performance of manganese dioxide (MnO2) as a cathodic catalyst in an H-type microbial fuel cell was examined. The MnO2 layer on the carbon fiber surface was deposited by simply immersing the carbon in an aqueous KMnO4 solution. The microbial fuel cell was characterized by polarization and power curves. A maximum power peak of 6.09 mW/m2 was obtained with a current density of 22 mA/m2, showing that MnO2 can be a low-cost alternative to be used as catalytic material in the cathode of these devices.

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Section: Polarization Curve and Power Densitymentioning

confidence: 99%

Performance of a microbial fuel cell using MnO2 as cathode catalyst

CALZADO-ARAGÓN,

FUENTES-ALBARRÁN,

ALARCÓN-HERNÁNDEZ

2023

Engineering and Applied Sciences

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“…Most of the published works using birnessite were addressed for battery/power related issues, but SMFC topics were not included. For this work, birnessite/CF was easily synthetized employing a simple procedure well documented elsewhere [68,69]. This procedure is concisely described here.…”

Section: Smfc Electrodesmentioning

confidence: 99%

“…Thereafter, the catalyzed surface was gradually dried, first at room temperature for 30 min and finally in an oven at 90 o C for 2 h. The birnessite/CF was then ready to be fixed in the SMFC. In recent works [68,70] the main results of the characterization of cathodes (CF and birnessite/CF) were published. They included surface morphology (field emission scanning electron microscopy and X-ray spectrum) and linear voltammetry (ORR analysis).…”

Section: Smfc Electrodesmentioning

confidence: 99%

“…Such ΔV was considered the SMFC OCV that resulted from an anode colonized by a consistent bacterial community. This procedure has previously been accepted as a criterion for deciding that the BES pseudo-steady conditions were reached [68,73]. A set of different R ext , from 38 kΩ to 250 Ω, was connected sequentially between SMFC electrodes to obtain the polarization curve for a given experimental conditions.…”

Section: Calculations Data Acquisition and Electrochemical Analysismentioning

confidence: 99%

“…A set of different R ext , from 38 kΩ to 250 Ω, was connected sequentially between SMFC electrodes to obtain the polarization curve for a given experimental conditions. From this curve the power vs current curve was derived, following the procedure described elsewhere [68]. Some key experiments were performed three times and then averaged.…”

Section: Calculations Data Acquisition and Electrochemical Analysismentioning

confidence: 99%

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Boosting Power Generation by Sediment Microbial Fuel Cell in Oil-Contaminated Sediment Amended with Gasoline/Kerosene

Aleman-Gama

Cornejo-Martell²,

Kamaraj³

et al. 2022

J. Electrochem. Sci. Technol

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The high internal resistance (Rint) that develops across the sediment microbial fuel cells (SMFC) limits their power production (~4/10 mW m−2) that can be recovered from an initial oil-contaminated sediment (OCS). In the anolyte, Rint is related to poor biodegradation activity, quality and quantity of contaminant content in the sediment and anode material. While on the catholyte, Rint depends on the properties of the catholyte, the oxygen reduction reaction (ORR), and the cathode material. In this work, the main factors limiting the power output of the SMFC have been minimized. The power output of the SMFC was increased (47 times from its initial value, ~4 mW m−2) minimizing the SMFC Rint (28 times from its initial value, 5000 ohms), following the main modifications. Anolyte: the initial OCS was amended with several amounts of gasoline and kerosene. The best anaerobic microbial activity of indigenous populations was better adapted (without more culture media) to 3 g of kerosene. Catholyte: ORR was catalyzed in birnessite/carbon fabric (CF)-cathode at pH 2, 0.8M Na2SO4. At the class level, the main microbial groups (Gammaproteobacteria, Coriobacteriia, Actinobacteria, Alphaproteobacteria) with electroactive members were found at C-anode and were associated with the high-power densities obtained. Gasoline is more difficult to biodegrade than kerosene. However, in both cases, SMFC biodegradation activity and power output are increased when ORR is performed on birnessite/CF in 0.8 M Na2SO4 at pH 2. The work discussed here can focus on bioremediation (in heavy OCS) or energy production in future work.

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