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首页> 外文期刊>Environmental Science & Technology >Sustainable Energy Recovery in Wastewater Treatment by Microbial Fuel Cells: Stable Power Generation with Nitrogen-doped Graphene Cathode
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Sustainable Energy Recovery in Wastewater Treatment by Microbial Fuel Cells: Stable Power Generation with Nitrogen-doped Graphene Cathode

机译：微生物燃料电池处理废水中的可持续能源回收：掺氮石墨烯阴极稳定发电

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摘要

Microbial fuel cells (MFCs) recover energy sustainably in wastewater treatment.Performance of non-noble cathode catalysts with low cost in neutral medium is vital for stable power generation.Nitrogen-doped graphene (NG) as cathode catalyst was observed to exhibit high and durable activity at buffered pH 7.0 during electrochemical measurements and in MFCs with respect to Pt/C counterpart.Electrochemical measurements showed that the oxygen reduction reaction (ORR) on NG possessed sustained activity close to the state-of-art Pt/C in terms of onset potential and electron transfer number.NG-MFCs displayed maximum voltage output of 650 mV and maximum power density of 776 ± 12 mW m~(-2),larger than 610 mV and 750 ± 19 mW m~(-2) of Pt/C-MFCs,respectively.Furthermore,long-time test lasted over 90 days,during which the maximum power density of NG-MFCs declined by 7.6%,with stability comparable to Pt/C-MFCs.Structure characterization of NG implied that the relatively concentrated acidic oxygen-containing groups improved such long-time stability by repelling the protons due to the same electrostatic force,and thus the C-N active centers for ORR were left undestroyed.These findings demonstrated the competitive advantage of NG to advance the application of MFCs for recovering biomass energy in treatment of wastewater with neutral pH.
机译：微生物燃料电池（MFCs）可在废水处理中可持续地回收能量。低成本的非贵金属阴极催化剂在中性介质中的性能对于稳定发电至关重要;观察到氮掺杂石墨烯（NG）作为阴极催化剂表现出的高耐久性电化学测量期间以及在MFC中相对于Pt / C对应物，在缓冲pH 7.0下具有较高的活性。电化学测量表明，NG上的氧还原反应（ORR）具有持续的活性，接近发病时的最新Pt / C NG-MFCs的最大电压输出为650 mV，最大功率密度为776±12 mW m〜（-2），大于610 mV和750±19 mW m〜（-2）的Pt /此外，长时间测试持续了90天，在此期间NG-MFC的最大功率密度下降了7.6％，稳定性与Pt / C-MFC相当。NG的结构表征暗示浓酸性氧气保留基团通过排斥相同的静电力而使质子排斥，从而改善了这种长期稳定性，因此，ORR的CN活性中心未被破坏。这些发现证明了NG的竞争优势，从而促进了MFCs在生物质能量回收中的应用。 pH中性的废水处理。

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  • 来源
    《Environmental Science & Technology》 |2013年第23期|13889-13895|共7页
  • 作者

    Yuan Liu; Hong Liu; Chuan Wang; Shuang-Xia Hou; Nuan Yang;

  • 作者单位

    Key Laboratory of Reservoir Aquatic Environment,Chinese Academy of Sciences,Chongqing 400714,China,Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China;

    Key Laboratory of Reservoir Aquatic Environment,Chinese Academy of Sciences,Chongqing 400714,China,Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China;

    Key Laboratory of Reservoir Aquatic Environment,Chinese Academy of Sciences,Chongqing 400714,China,Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China;

    Key Laboratory of Reservoir Aquatic Environment,Chinese Academy of Sciences,Chongqing 400714,China,Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China;

    Key Laboratory of Reservoir Aquatic Environment,Chinese Academy of Sciences,Chongqing 400714,China,Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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