Enhancing performance of microbial fuel cell by using graphene supported V2O5-nanorod catalytic cathode

Noori, Md. T.; Mukherjee, C. K.; Ghangrekar, Makarand M.

doi:10.1016/j.electacta.2017.01.016

Cited by 140 publications

(27 citation statements)

References 35 publications

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“…All cathodes showed similar ohmic resistance values because of the same anodic medium and cell configuration, which was in accordance with the previous reports . It should be mentioned that the charge transfer resistance related to the activation energy of electrode, and the resistance reflects the reaction kinetics occurring on the electrode . As can be seen from Table and Figure d, Co/N/C‐900 cathode (8.9±0.8 Ω) showed the lowest charge transfer resistance, which was significantly lower than Co/N/C‐700 cathode (12.7±0.4 Ω), Co/N/C‐800 cathode (15.7±0.5 Ω), and Co/N/C‐1000 cathode (21.7±0.5 Ω).…”

Section: Resultssupporting

confidence: 89%

“…The result was attributed to that the high introduction content of graphitic−N could enhance cathode conductivity, accelerate electrons transfer and further reduce the activation energy barrier for ORR. It should be also noted that the lowered charge transfer resistance of cathode can lower the hindrance of charge transport and enhance the kinetic deriving force . Besides, the charge transfer resistance of Co/N/C‐900 cathode was slightly lower than commercial Pt/C cathode (7.5 Ω±0.6), indicating Co/N/C‐900 can represent similar electrochemical performance compared to Pt/C.…”

Section: Resultsmentioning

confidence: 96%

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Cobalt‐based Catalysts Modified Cathode for Enhancing Bioelectricity Generation and Wastewater Treatment in Air‐breathing Cathode Microbial Fuel Cells

Zhong

Zhang

et al. 2019

Electroanalysis

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To seek an efficient way to enhance the power output and wastewater treatment of microbial fuel cell (MFC), several cobalt‐based composites are successfully synthesized by a facile hydrothermal method under different pyrolysis temperature, and these composites are used as electrocatalyst in air‐breathing cathode of MFC. Different species of nitrogen atom are successfully grafted on the cobalt‐based composites and confirmed by physical and electrochemical analyses. In MFC tests, the maximum power density increases from 577.8 mW m−2 to 931.1 mW m−2 with pyrolysis temperature (except for 1000 °C). These electrochemical tests and high COD removal show that Co/N/C‐900 can rapidly transfer electron via a 2×2 e− transfer pathway, mainly due to the exposure of large electrochemical active area and introduction of the defects of pyridinic−N and abundant oxygen vacancies. Although the power density of MFC with Co/N/C‐900 is 81.1 % of that of commercial Pt/C, the MFC with Co/N/C‐900 is more stable than that of Pt/C, and the power density for Co/N/C‐900 has only a 2.8 % decrease during 25‐cycles operation. The great electrocatalytic activity of the novel Co/N/C‐900 composite exhibits a superior outlook for scale‐up application of MFC in the future.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 96%

Cobalt‐based Catalysts Modified Cathode for Enhancing Bioelectricity Generation and Wastewater Treatment in Air‐breathing Cathode Microbial Fuel Cells

Zhong

Zhang

et al. 2019

Electroanalysis

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“…In addition, when the substrate was added to the reactors, the current generation increased rapidly and then decreased with the days of operation followed by the utilization of CO 2 by the microorganisms present on the cathodic biofilm. This is a typical current production profile of a biological fuel cells as reported in the earlier studies . The MES‐1 could produce high amount of current as compared to the MES‐2, possibly due to following reasons: 1.…”

Section: Resultssupporting

confidence: 55%

“…This is a typical current production profile of a biological fuel cells as reported in the earlier studies. [4,46] The MES-1 could produce high amount of current as compared to the MES-2, possibly due to following reasons: 1. Fe x MnO y catalyst decreased the overpotential loss by enhancing charge transfer rate between cathode to microbes 2. the catalyst behaved like pseudo capacitor, which acted as electron sink and therefore enhanced the current generation.…”

Section: Current Generation Profile Of Messmentioning

confidence: 99%

Highly Porous Fe_xMnO_y Microsphere as an Efficient Cathode Catalyst for Microbial Electrosynthesis of Volatile Fatty Acids from CO₂

Noori¹,

Min²

2019

ChemElectroChem

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Microbial electrosynthesis (MES) can efficiently convert CO2 into valuable chemicals. A biocathode, which plays central role in MES process, is expected to have very high surface area and catalytic activity to derive the cathodic reaction flawlessly. In this study, a highly porous bimetallic FexMnOy (x=1, 2 and y=3, 4) microsphere was synthesized and applied as cathode catalyst in a single chamber MES. MES having FexMnOy exhibited higher net acetate production rate (204 mM/m2d) and coulombic efficiency (58 %) than the MES without catalyst (180 mM/m2d and 34 %). The excellent performance of MES with FexMnOy was attributed to the high Brunauer‐Emmett‐Teller (BET) surface area (around 278 m2/g) with rough surface and efficient electron transfer from cathode to microorganism promoted by FexMnOy complex. The cathode with FexMnOy reduced charge transfer resistance by ∼70 % and enhanced the exchange current density by 7.2‐times compared to plain cathode. This study suggests that FexMnOy can be used as the highly efficient and low‐cost catalyst on cathode of scaled up MESs.

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“…The charge transfer resistance is related to the activation energy of the cathode. A smaller charge transfer resistance of the cathode indicates a higher kinetic driving force and a lower hindrance to charge transport [48]. Sometimes, cathode materials are coated with catalysts (e.g., Pt, MnO 2 ) to increase the kinetics of oxygen reduction at the electrode surface and reduce the cathodic reaction activation energy [44,49].…”

Section: Effects Of Cathode Materialsmentioning

confidence: 99%

The Potential of Microbial Fuel Cells for Remediation of Heavy Metals from Soil and Water—Review of Application

Fang

Achal

2019

Microorganisms

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The global energy crisis and heavy metal pollution are the common problems of the world. It is noted that the microbial fuel cell (MFC) has been developed as a promising technique for sustainable energy production and simultaneously coupled with the remediation of heavy metals from water and soil. This paper reviewed the performances of MFCs for heavy metal removal from soil and water. Electrochemical and microbial biocatalytic reactions synergistically resulted in power generation and the high removal efficiencies of several heavy metals in wastewater, such as copper, hexavalent chromium, mercury, silver, thallium. The coupling system of MFCs and microbial electrolysis cells (MECs) successfully reduced cadmium and lead without external energy input. Moreover, the effects of pH and electrode materials on the MFCs in water were discussed. In addition, the remediation of heavy metal-contaminated soil by MFCs were summarized, noting that plant-MFC performed very well in the heavy metal removal. Microorganisms 2019, 7, 697 2 of 13 electrode reaction using acetate as a substrate [6] and a two-chamber MFC setup (Figure 1) are shown below: Anodic reaction : CH 3 COO − +2H 2 O microbes → 2CO 2 +7H + +8e − (1) Cathodic reaction : O 2 +4e − +4H + → 2H 2 O. (2)

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Enhancing performance of microbial fuel cell by using graphene supported V2O5-nanorod catalytic cathode

Cited by 140 publications

References 35 publications

Cobalt‐based Catalysts Modified Cathode for Enhancing Bioelectricity Generation and Wastewater Treatment in Air‐breathing Cathode Microbial Fuel Cells

Cobalt‐based Catalysts Modified Cathode for Enhancing Bioelectricity Generation and Wastewater Treatment in Air‐breathing Cathode Microbial Fuel Cells

Highly Porous Fe_xMnO_y Microsphere as an Efficient Cathode Catalyst for Microbial Electrosynthesis of Volatile Fatty Acids from CO₂

The Potential of Microbial Fuel Cells for Remediation of Heavy Metals from Soil and Water—Review of Application

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Enhancing performance of microbial fuel cell by using graphene supported V2O5-nanorod catalytic cathode

Cited by 140 publications

References 35 publications

Cobalt‐based Catalysts Modified Cathode for Enhancing Bioelectricity Generation and Wastewater Treatment in Air‐breathing Cathode Microbial Fuel Cells

Cobalt‐based Catalysts Modified Cathode for Enhancing Bioelectricity Generation and Wastewater Treatment in Air‐breathing Cathode Microbial Fuel Cells

Highly Porous FexMnOy Microsphere as an Efficient Cathode Catalyst for Microbial Electrosynthesis of Volatile Fatty Acids from CO2

The Potential of Microbial Fuel Cells for Remediation of Heavy Metals from Soil and Water—Review of Application

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Product

Resources

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Highly Porous Fe_xMnO_y Microsphere as an Efficient Cathode Catalyst for Microbial Electrosynthesis of Volatile Fatty Acids from CO₂