Coupling of anodic and cathodic modification for increased power generation in microbial fuel cells

Jin, Tao; Luo, Jianmei; Yang, Jie; Zhou, Lei; Zhao, Yingying; Zhou, Minghua

doi:10.1016/j.jpowsour.2012.07.066

Cited by 26 publications

(24 citation statements)

References 41 publications

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“…The finding of this study could be explained by the fact that heat treatment under continuous air flow results in the introduction of nitrogen functional groups on the surface of the graphite cathode. The presence of nitrogen on the graphite surface might have induced a slight positive charge, which could attract more electrons from the anode and result in increased production of H 2 O 2 …”

Section: Resultsmentioning

confidence: 99%

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In situ production of hydrogen peroxide in a microbial fuel cell for recalcitrant wastewater treatment

Asghar

Raman

Daud

2017

J. Chem. Technol. Biotechnol

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BACKGROUND Microbial fuel cells (MFCs) offer a sustainable and energy efficient solution for in situ hydrogen peroxide (H2O2) production with simultaneous power generation. In MFCs, H2O2 is produced as a result of two‐electron oxygen reduction at graphite cathode surface. However, due to poor catalytic properties of graphite cathode high yields of H2O2 are not attained. Therefore, this study investigates the feasibility of in situ H2O2 production in MFC for recalcitrant wastewater treatment. METHODOLOGY AND RESULTS In this study, a dual chamber MFC was used. A heat‐treated graphite electrode was used as cathode and Nafion‐117 as membrane. Cyclic voltammetric analysis was also performed to study the potential of heat‐treated graphite cathode for H2O2 production. Experimentally, a maximum of 140 mg L−1 of H2O2 was produced with simultaneous power generation of 33.52 W m−3. Consequently, in situ Fenton oxidation experiments were performed and compared with conventional Fenton oxidation using a recalcitrant pollutant i.e. Acid Blue 113 dye. On average, 24% difference between the performance of the Fenton and in situ Fenton oxidation was observed while 42% reduction in the cost of process was obtained in the case of the in situ Fenton oxidation process. CONCLUSION The current study proved that MFC is a sustainable solution for in situ Fenton oxidation (followed by H2O2 production) with less requirement of H2O2. © 2017 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

“…The presence of nitrogen on the graphite surface might have induced a slight positive charge, which could attract more electrons from the anode and result in increased production of H 2 O 2 . 20,33…”

Section: Resultsmentioning

confidence: 99%

In situ production of hydrogen peroxide in a microbial fuel cell for recalcitrant wastewater treatment

Asghar

Raman

Daud

2017

J. Chem. Technol. Biotechnol

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“…Noteworthy, several researchers have found that a higher N content on CC anodes was responsible for a higher anode performance . However, these studies did not elucidate which types of N facilitated electricity production.…”

Section: Resultsmentioning

confidence: 97%

Enhanced power production of microbial fuel cells by reducing the oxygen and nitrogen functional groups of carbon cloth anode

Cheng

Liu

Sun

et al. 2016

Surface & Interface Analysis

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The physicochemical properties of anode material are important for the electron transfer of anode bacteria and electricity generation of microbial fuel cells (MFCs). In this work, carbon cloth anode was pretreated with isopropanol, hydrogen peroxide (H2O2) and sodium hypochlorite (NaOCl) in order to reduce the anode functional groups. The influence of functional groups on the electrochemical properties of carbon cloth anode and power generation of MFCs was investigated. The anode pretreatments removed the surface sizing layer of carbon cloth and substantially reduced the contents of C‐O and pyridinic/pyrrolic N groups on the anode. Electrochemical impedance spectroscopy and cyclic voltammetry analyses of the biofilm‐matured anodes revealed an enhanced electrochemical electron transfer property because of the anode pretreatments. As compared with the untreated control (612 ± 6 mW m−2), the maximum power density of an acetate‐fed single‐chamber MFC was increased by 26% (773 ± 5 mW m−2) with the isopropanol treated anode. Additional treatment with H2O2 and NaOCl further increased the maximum power output to 844 ± 5 mW m−2 and 831 ± 4 mWm−2. A nearly inverse liner relationship was observed between the contents of C‐O and pyridinic/pyrrolic N groups on anodes and the anodic exchange current density and the power output of MFCs, indicating an adverse effect of these functional groups on the electricity production of anodes. Results from this study will further our understanding on the microbial interaction with carbon‐based electrodes and provide an important guidance for the modification of anode materials for MFCs in future studies. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Firstly, the MWCNT in EPD-3D are considerably thinner in diameter as those previously grown (9.5nm now vs 60nm average diameter in work previously reported) by CVD (Chapter 6). Moreover, the MWCNT layer on the EPD-3D consists of functionalized MWCNT, since the nanotubes underwent a strong chemical oxidation prior to the electrophoretic deposition step [134,136,137]. Finally, when comparing the high resolution SEM images of both structures, we observe that the MWCNT layer in EPD-3D is much denser than work previously reported (Chapter 6, Figure 19).…”

Section: Implications Towards Practical Implementationmentioning

confidence: 51%

“…The electron transfer potential is thus maintained at the enzyme redox potential, instead of the mediator potential. For instance, pre-treating anodes with ammonia gas at 700ºC [133], with nitric acid and ethylenediamine [134], with HNO 3 and quinone/quinoids [135], or HNO 3 and hydrazine [136] all showed successful at enhancing the current density at anodes of microbial fuel cells. Zhou et al…”

Section: Bioanode Electrode Materials -A Brief Overviewmentioning

confidence: 99%

Microbial electrosynthesis from carbon dioxide: performance enhancement and elucidation of mechanisms

Jourdin¹

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Microbial electrosynthesis (MES) of organics from carbon dioxide has been recently put forward as an attractive technology for the renewable production of valuable multi-carbon reduced end-products and as a promising CO 2 transformation strategy. MES is a biocathode-driven process that relies on the conversion of electrical energy into high energy-density chemicals. However, MES remains a nascent concept and there is still limited knowledge on many aspects.It is still unclear whether autotrophic microbial biocathode biofilms are able to selfregenerate under purely cathodic conditions without any external electron or organic carbon sources. Here we report on the successful development and long-term operation of an autotrophic biocathode whereby an electroactive biofilm was able to grow and sustain itself with CO 2 and the cathode as sole carbon and electron source, respectively, with H 2 as sole product. From a small inoculum of 15 mg COD (in 250 mL), the bioelectrochemical system operating at -0.5 V vs. SHE enabled an estimated biofilm growth of 300 mg as COD over a period of 276 days.A critical aspect is that reported performances of bioelectrosynthesis of organics are still insufficient for scaling MES to practical applications. Selective microbial consortia and biocathode material development are of paramount importance towards performance enhancement. A novel biocompatible, highly conductive three-dimensional cathode was manufactured by direct growth of flexible multiwalled carbon nanotubes on reticulated vitreous carbon (NanoWeb-RVC) by chemical vapour deposition (CVD). The results demonstrated that: (i) the high surface area to volume ratio of the macroporous RVC maximizes the available biofilm area while ensuring effective mass transfer to and from the biofilm, and (ii) the nanostructure enhances the bacteria-electrode interaction, biofilm development, microbial extracellular electron transfer, and acetate bioproduction rate.However, for scale-up beyond certain sizes, there are some limitations with the CVD technique. We harnessed the throwing power of electrophoretic deposition technique (EPD), suitable for industrial scale production, to form multi-walled CNT coatings onto RVC to generate a new hierarchical porous structure, hereafter called EPD-3D. A very effective mixed microbial consortium was successfully enriched and transferred to EPD-3D reactors and demonstrated drastic performance enhancement reaching biocathode current density of -102 ± 1 A m -2 and acetate production rate of 685 ± 30 g m -2 day -1 .ii An in-depth understanding on how electrons flow from the cathode to the terminal electron acceptor is still missing but crucial (e.g. for improved reactor design). High rates of acetate production by microbial electrosynthesis was shown to occur via biologically-induced hydrogen, likely through the biological synthesis of metal copper particles, with 99 ± 1% electron recovery into acetate. The acetate-producing bacteria showed the remarkable ability to consume a high H 2 flux (ca. 1.15 m ...

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Coupling of anodic and cathodic modification for increased power generation in microbial fuel cells

Cited by 26 publications

References 41 publications

In situ production of hydrogen peroxide in a microbial fuel cell for recalcitrant wastewater treatment

In situ production of hydrogen peroxide in a microbial fuel cell for recalcitrant wastewater treatment

Enhanced power production of microbial fuel cells by reducing the oxygen and nitrogen functional groups of carbon cloth anode

Microbial electrosynthesis from carbon dioxide: performance enhancement and elucidation of mechanisms

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