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    The impact of new cathode materials relative to baseline performance of microbial fuel cells all with the same architecture and solution chemistry

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    Type
    Article
    Authors
    Yang, Wulin
    Kim, Kyoung-Yeol
    Saikaly, Pascal cc
    Logan, Bruce E
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    KAUST Grant Number
    OSR-2016-CPF-2907-03
    Date
    2017
    Permanent link to this record
    http://hdl.handle.net/10754/623300
    
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    Abstract
    Differences in microbial fuel cell (MFC) architectures, materials, and solution chemistries, have previously hindered direct comparisons of improvements in power production due to new cathode materials. However, one common reactor design has now been used in many different laboratories around the world under similar operating conditions based on using: a graphite fiber brush anode, a platinum cathode catalyst, a single-chamber cube-shaped (4-cm) MFC with a 3-cm diameter anolyte chamber, 50 mM phosphate buffer, and an acetate fuel. Analysis of several publications over 10 years from a single laboratory showed that even under such identical operational conditions, maximum power densities varied by 15%, with an average of 1.36 ± 0.20 W m–2 (n=24), normalized to cathode projected area (34 W m–3 liquid volume). In other laboratories, maximum power was significantly less, with an average of 1.03 ± 0.46 W m–2 (n=11), despite identical conditions. One likely reason for the differences in power is cathode age. Power production with Pt catalyst cathodes significantly declined after one month of operation or more to 0.87 ± 0.31 W m–2 (n=18) based on studies where cathode aging was examined, while in many studies the age of the cathode was not reported. Using these studies as a performance baseline, we review the claims of improvements in power generation due to new anode or cathode materials, or changes in solution conductivities and substrates.
    Citation
    Yang W, Kim K-Y, Saikaly PE, Logan BE (2017) The impact of new cathode materials relative to baseline performance of microbial fuel cells all with the same architecture and solution chemistry. Energy Environ Sci. Available: http://dx.doi.org/10.1039/c7ee00910k.
    Sponsors
    This work was supported by Strategic Environmental Research and Development Program (SERDP), and Award OSR-2016-CPF-2907-03 from the King Abdullah University of Science and Technology (KAUST).
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Energy & Environmental Science
    DOI
    10.1039/c7ee00910k
    Additional Links
    http://pubs.rsc.org/en/Content/ArticleLanding/2017/EE/C7EE00910K#!divAbstract
    ae974a485f413a2113503eed53cd6c53
    10.1039/c7ee00910k
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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