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    Effect of nitrogen addition on the performance of microbial fuel cell anodes

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    Type
    Article
    Authors
    Saito, Tomonori
    Mehanna, Maha
    Wang, Xin
    Cusick, Roland D.
    Feng, Yujie
    Hickner, Michael A.
    Logan, Bruce E.
    KAUST Grant Number
    KUS-11-003-I3
    Date
    2011-01
    Permanent link to this record
    http://hdl.handle.net/10754/598054
    
    Metadata
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    Abstract
    Carbon cloth anodes were modified with 4(N,N-dimethylamino)benzene diazonium tetrafluoroborate to increase nitrogen-containing functional groups at the anode surface in order to test whether the performance of microbial fuel cells (MFCs) could be improved by controllably modifying the anode surface chemistry. Anodes with the lowest extent of functionalization, based on a nitrogen/carbon ratio of 0.7 as measured by XPS, achieved the highest power density of 938mW/m2. This power density was 24% greater than an untreated anode, and similar to that obtained with an ammonia gas treatment previously shown to increase power. Increasing the nitrogen/carbon ratio to 3.8, however, decreased the power density to 707mW/m2. These results demonstrate that a small amount of nitrogen functionalization on the carbon cloth material is sufficient to enhance MFC performance, likely as a result of promoting bacterial adhesion to the surface without adversely affecting microbial viability or electron transfer to the surface. © 2010 Elsevier Ltd.
    Citation
    Saito T, Mehanna M, Wang X, Cusick RD, Feng Y, et al. (2011) Effect of nitrogen addition on the performance of microbial fuel cell anodes. Bioresource Technology 102: 395–398. Available: http://dx.doi.org/10.1016/j.biortech.2010.05.063.
    Sponsors
    This research was supported by the National Science Foundation (CBET-08,03,137), Award KUS-11-003-I3 from the King Abdullah University of Science and Technology, and the National Creative Research Groups of China (No. 50821002). We thank Dr. Timothy B. Tighe for helping XPS analysis. We also thank Mr. David W. Jones and Ms. Ellen M. Bingham for technical support for this research.
    Publisher
    Elsevier BV
    Journal
    Bioresource Technology
    ISSN
    0960-8524
    DOI
    10.1016/j.biortech.2010.05.063
    PubMed ID
    20889061
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.biortech.2010.05.063
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