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首页> 外文期刊>Electroanalysis >Cobalt-based Catalysts Modified Cathode for Enhancing Bioelectricity Generation and Wastewater Treatment in Air-breathing Cathode Microbial Fuel Cells
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Cobalt-based Catalysts Modified Cathode for Enhancing Bioelectricity Generation and Wastewater Treatment in Air-breathing Cathode Microbial Fuel Cells

机译：基于钴的催化剂改性阴极，用于增强空气呼吸阴极微生物燃料电池中的生物电性产生和废水处理

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摘要

To seek an efficient way to enhance the power output and wastewater treatment of microbial fuel cell (MFC), several cobalt-based composites are successfully synthesized by a facile hydrothermal method under different pyrolysis temperature, and these composites are used as electrocatalyst in air-breathing cathode of MFC. Different species of nitrogen atom are successfully grafted on the cobalt-based composites and confirmed by physical and electrochemical analyses. In MFC tests, the maximum power density increases from 577.8 mW m(-2) to 931.1 mW m(-2) with pyrolysis temperature (except for 1000 degrees C). These electrochemical tests and high COD removal show that Co/N/C-900 can rapidly transfer electron via a 2x2 e(-) transfer pathway, mainly due to the exposure of large electrochemical active area and introduction of the defects of pyridinic-N and abundant oxygen vacancies. Although the power density of MFC with Co/N/C-900 is 81.1 % of that of commercial Pt/C, the MFC with Co/N/C-900 is more stable than that of Pt/C, and the power density for Co/N/C-900 has only a 2.8 % decrease during 25-cycles operation. The great electrocatalytic activity of the novel Co/N/C-900 composite exhibits a superior outlook for scale-up application of MFC in the future.
机译：为了寻求增强微生物燃料电池（MFC）的功率输出和废水处理的有效方法，通过在不同热解温度下通过容易水热法成功地合成了几种基于钴基复合材料，并且这些复合材料用作空气呼吸中的电催化剂MFC阴极。不同种类的氮原子在钴基复合材料上成功接枝并通过物理和电化学分析证实。在MFC测试中，最大功率密度从577.8 mw m（-2）增加到931.1 mw m（-2），热解温（1000℃除外）。这些电化学测试和高COD去除表明，CO / N / C-900可以通过2×2 E（ - ）转移途径快速传递电子，主要是由于大电化学活性面积的暴露和引入吡啶-N和吡啶-N的缺陷丰富的氧气职位空缺。尽管MFC的MFC具有CO / N / C-900的功率密度为商业PT / C的81.1％，但具有CO / N / C-900的MFC比PT / C的MFC更稳定，功率密度CO / N / C-900在25周期操作中仅减少2.8％。新型CO / N / C-900复合材料的巨大电催化活性表现出未来MFC的扩大应用的优越前景。

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  • 来源
    《Electroanalysis》 |2019年第8期|共12页
  • 作者

    Li Meng; Zhong Kengqiang; Zhang Liqiu; Wang Shengdan; Zhang Hongguo; Huang Yu; Chen Shi; Mai Hanjian; Zhang Nan;

  • 作者单位

    Guangzhou Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Civil Engn Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr Guangzhou 510006 Guangdong Peoples R China;

    Guangzhou Univ Sch Environm Sci &

    Engn Guangzhou Higher Educ Mega Ctr Guangzhou 510006 Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 电化学、电解、磁化学;
  • 关键词

    Microbial fuel cell; Oxygen reduction reaction; 2x2 e(-) transfer pathway; defects of pyridinic-nitrogen;

    机译：微生物燃料电池;氧还原反应;2×2 e（ - ）转移途径;吡啶 - 氮的缺陷;

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