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Reduced graphene oxide modified activated carbon for improving power generation of air-cathode microbial fuel cells

机译:还原的氧化石墨烯改性活性炭,用于改善空气阴极微生物燃料电池的发电

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摘要

Activated carbon (AC) has been widely used as catalyst for oxygen reduction reaction (ORR) in air-cathode microbial fuel cells (MFCs). Here we demonstrate a new method to improve the AC air-cathode by blending it with reduced graphene oxide (rGO). rGO sheets are first deposited on Ni foam and AC is then brushed onto it with controlled mass loading. rGO sheets not only improve the electrical conductivity of AC, but also provide a large number of ORR areas. Rotating ring disk electrode measurements reveal that the number of transferred electrons at rGO-AC cathode is 3.5, indicating the four-electron pathway is the dominant process. Significantly, the MFC with rGO-AC cathode delivers a maximum power density of 2.25 +/- 0.05 W/m(2), which is substantially higher than that of plain AC cathode (1.35 +/- 0.07 W/m(2)) and those for other air-cathode MFCs using AC as ORR catalyst under the same mass loading.
机译:活性炭(AC)已被广泛用作空气阴极微生物燃料电池(MFC)中的氧还原反应(ORR)的催化剂。在这里,我们演示了一种通过将其与还原的氧化石墨烯(rGO)混合来改善AC空气阴极的新方法。首先将rGO薄板沉积在Ni泡沫上,然后在可控质量加载下将AC刷到其上。 rGO薄板不仅可以改善交流电的导电性,还可以提供大量的ORR区域。旋转圆盘电极的测量表明,rGO-AC阴极的转移电子数为3.5,表明四电子路径是主要过程。值得注意的是,带有rGO-AC阴极的MFC的最大功率密度为2.25 +/- 0.05 W / m(2),远高于普通AC阴极的最大功率密度(1.35 +/- 0.07 W / m(2))。以及在相同质量负载下使用AC作为ORR催化剂的其他空气阴极MFC的那些。

著录项

  • 来源
    《Journal of Materials Research》 |2018年第9期|1279-1287|共9页
  • 作者单位

    Chongqing Univ, Inst Engn Thermophys, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China;

    Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95060 USA;

    Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95060 USA;

    Chongqing Univ, Inst Engn Thermophys, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China;

    Chongqing Univ, Inst Engn Thermophys, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China;

    Chongqing Univ, Inst Engn Thermophys, Key Lab Low Grade Energy Utilizat Technol & Syst, Chongqing 400030, Peoples R China;

    Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95060 USA;

    Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95060 USA;

    Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95060 USA;

  • 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);
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  • 正文语种 eng
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