Electrochemical impedance study on methyl orange and methyl red as power enhancing electron mediators in glucose fed microbial fuel cell

2013 ◽  
Vol 44 (4) ◽  
pp. 617-621 ◽  
Author(s):  
Mir Ghasem Hosseini ◽  
Iraj Ahadzadeh
Keyword(s):  
Fuel Cell ◽  
Methyl Orange ◽  
Microbial Fuel Cell ◽  
Electrochemical Impedance ◽  
Methyl Red ◽  
Impedance Study ◽  
Electron Mediators

The Influence of Mediator Concentration on the Performance of Microbial Fuel Cell

2012 ◽  
Vol 512-515 ◽  
pp. 1520-1524 ◽  
Author(s):  
Yu Zhao ◽  
Xiao Bin Wang ◽  
Peng Li ◽  
Yan Ping Sun
Keyword(s):  
Methylene Blue ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Power Density ◽  
Peak Power ◽  
Electrochemical Impedance ◽  
Peak Power Output ◽  
Anode Potential ◽  
High Concentration ◽  
Peak Power Density

Electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), power density and anode potential are used to characterize the mediator microbial fuel cell at different methylene blue (MB) concentrations. At lower MB concentration between 9.98×10-3 mmol/L and 1.66×10-1 mmol/L, the increased power density is enabled by using high mediator concentrations. Higher peak power density of 159.6 mw/m2 is observed compared with the peak power density of 36.0 mw/m2. But MB at too high concentration is disadvantageous to the perform of MFC. At the MB concentration of 2.50×10-1 mmol/L, the peak power output is just 128.4 mw/m2, which is lower than 159.6 mw/m2 at MB concentration of 1.66×10-1 mmol/L.

Nanostructured polyaniline-coated anode for improving microbial fuel cell power output

2013 ◽  
Vol 67 (8) ◽  
Author(s):  
Ali Mehdinia ◽  
Minodokht Dejaloud ◽  
Ali Jabbari
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Glassy Carbon ◽  
Electrochemical Impedance ◽  
Anode Surface ◽  
Carbon Anode ◽  
Pani Film ◽  
Anode Modification ◽  
Power Densities ◽  
Electrochemical Polymerisation

AbstractAn approach for improving the power generation of a dual-chamber microbial fuel cell by using a nanostructured polyaniline (PANI)-modified glassy carbon anode was investigated. Modification of the glassy carbon anode was achieved by the electrochemical polymerisation of aniline in 1 M H2SO4 solution. The MFC reactor showed power densities of 0.082 mW cm−2 and 0.031 mW cm−2 for the nano- and microstructured PANI anode, respectively. The results from electron microscopy scanning confirmed formation of the nanostructured PANI film on the anode surface and the results from electrochemical experiments confirmed that the electrochemical activity of the anode was significantly enhanced after modification by nanostructured PANI. Electrochemical impedance spectroscopic results proved that the charge transfer would be facilitated after anode modification with nanostructured PANI.

Simultaneous Electricity Generation and Electrochemical Decolorization of Azo Dyes in Microbial Fuel Cells

2013 ◽  
Vol 291-294 ◽  
pp. 602-605 ◽  
Author(s):  
Liang Liu ◽  
Wen Yi Zhang
Keyword(s):  
Fuel Cell ◽  
Methyl Orange ◽  
Microbial Fuel Cell ◽  
Azo Dyes ◽  
Microbial Fuel Cells ◽  
Azo Dye ◽  
Electricity Generation ◽  
Sulfanilic Acid ◽  
Maximum Power Density ◽  
K Value

In this study we investigated the use of a microbial fuel cell (MFC) to abioticlly cathodic decolorization of a model azo dye, Methyl Orange (MO). Experimental results showed that electricity could be continuously generated the MO-fed MFC and MO was successfully decolorized in the cathode. The decolorization rate was highly dependent on the catholyte pH. When pH was varied from 3.0 to 9.0, the k value in relation to MO degradation decreased from 0.298 to 0.016 μmol min-1, and the maximum power density decreased from 34.77 to 1.51 mW m-2. Sulfanilic acid and N,N-dimethyl-p-phenylenediamine were identified as the decolorization products of MO by HPLC-MS.

scholarly journals A Carbon-Cloth Anode Electroplated with Iron Nanostructure for Microbial Fuel Cell Operated with Real Wastewater

2020 ◽  
Vol 12 (16) ◽  
pp. 6538 ◽  
Author(s):  
Enas Taha Sayed ◽  
Hussain Alawadhi ◽  
Khaled Elsaid ◽  
A. G. Olabi ◽  
Maryam Adel Almakrani ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Electrochemical Impedance ◽  
Open Circuit ◽  
Anode Surface ◽  
Carbon Cloth ◽  
Steady State Current ◽  
Real Wastewater ◽  
Improved Performance

Microbial fuel cell (MFC) is an emerging method for extracting energy from wastewater. The power generated from such systems is low due to the sluggish electron transfer from the inside of the biocatalyst to the anode surface. One strategy for enhancing the electron transfer rate is anode modification. In this study, iron nanostructure was synthesized on a carbon cloth (CC) via a simple electroplating technique, and later investigated as a bio-anode in an MFC operated with real wastewater. The performance of an MFC with a nano-layer of iron was compared to that using bare CC. The results demonstrated that the open-circuit voltage increased from 600 mV in the case of bare CC to 800 mV in the case of the iron modified CC, showing a 33% increase in OCV. This increase in OCV can be credited to the decrease in the anode potential from 0.16 V vs. Ag/AgCl in the case of bare CC, to −0.01 V vs. Ag/AgCl in the case of the modified CC. The power output in the case of the modified electrode was 80 mW/m2—two times that of the MFC using the bare CC. Furthermore, the steady-state current in the case of the iron modified carbon cloth was two times that of the bare CC electrode. The improved performance was correlated to the enhanced electron transfer between the microorganisms and the iron-plated surface, along with the increase of the anode surface- as confirmed from the electrochemical impedance spectroscopy and the surface morphology, respectively.

scholarly journals BIOELECTROCHEMICAL BEHAVIOR OF WILD TYPE BACILLUS CEREUS IN DUAL CHAMBER MICROBIAL FUEL CELL

2017 ◽  
Vol 18 (2) ◽  
pp. 79-86 ◽  
Author(s):  
M Amirul Islam
Keyword(s):  
Fuel Cell ◽  
Bacillus Cereus ◽  
Microbial Fuel Cell ◽  
Municipal Wastewater ◽  
Electrochemical Impedance ◽  
Electrical Energy ◽  
Charge Transfer Resistance ◽  
Organic Substrates ◽  
Wild Type ◽  
Transfer Resistance

Microbial fuel cell (MFC) is a bioelectrochemical system that uses bacteria as biocatalyst to oxidize organic substrates as well as release electrons, which can be harvested in an external circuit to produce electrical energy. In this study, a proteolytic biocatalyst Bacillus cereus (B. cereus) has been employed for the first time in a microbial fuel cell (MFC). The wild type pure culture was isolated from municipal wastewater and identified using Biolog Gen III analysis. The MFCs were fueled with palm oil mill effluent (POME) and attained the maximum power density of about 3.88 W/m3. The electrochemical behavior of MFC operated by B. cereus was evaluated using polarization curve, electrochemical impedance spectroscopy (EIS) and cyclic voltammetery (CV) analysis. B. Cereus excreated electron shuttling compound which significantly reduced the anode charge transfer resistance (52.95%). The FESEM result shows that B. Cereus has the capability of effective biofilm formation. These results revealed the electrocatalytic potentiality of B. cereus and which makes it a promising candidate to be used in MFCs. Therfore, this biocatlyst can be used to generate electricity through the wastewater valorization.

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