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首页> 外文期刊>Fuel >Impregnated thermoset pre-pressurized carbon composite electrodes in microbial fuel cell: Compositional functionalities influence on ORR with reference to graphite
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Impregnated thermoset pre-pressurized carbon composite electrodes in microbial fuel cell: Compositional functionalities influence on ORR with reference to graphite

机译：微生物燃料电池中的浸渍热固性预加压碳复合电极：组成官能团对石墨的影响影响ORR

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摘要

Advancement in developing specific compositional functionalities of electrodes that are energy-recovery efficient, cost-effective, durable and catalytically active is particularly challenging for microbial fuel cell (MFC) operation due to its bio-compatibility requirement. Compositional characteristics of the electrodes influence the electron charge-discharge rates, oxidation-reduction reaction and biofilm formation. In this study, compact carbon-carbon composite electrode (C/C composite), fabricated by high pressure hot-pressing method followed by densified low-pressure impregnation thermosetting carbonization, was evaluated as both anode and cathode in dual-chambered MFC with varied combinations with graphite electrode. Fed-batch experiments were operated with four combinations of electrode using 3 g/l glucose in designed synthetic wastewater as anolyte and oxygenated water as catholyte. C/C composite as cathode and graphite as anode (MFC-GC) depicted comparatively higher power density (0.37 W/m(2)) and current (2 A/m(2)) than the other configurations. Improved oxidation-reduction rate (ORR) kinetics enabled higher bioelectrogenic activity in MFC-GC with respect to the elemental and surface functionalities of C/C composite electrode. Bioelectrochemical analysis showed increased charge-transfer capacitance and electron flux while lowering the system losses in MFC-GC. The capability of C/C composite electrodes as cathode due to presence of higher oxygen functionalities and surface properties increased the oxidation-reduction rate kinetics towards higher energy output during MFC operation.
机译：由于其生物相容性要求，对能量恢复有效，成本效率，耐用的和催化活性的电极的特异性组成功能的进步尤其具有挑战性，这是由于其生物相容性要求的微生物燃料电池（MFC）操作。电极的组成特性会影响电子电荷 - 放电速率，氧化还原反应和生物膜形成。在该研究中，通过高压热压方法制造的紧凑型碳 - 碳复合电极（C / C复合材料），然后通过致密的低压浸渍热固性碳化，以各种组合的双腔MFC中的阳极和阴极评价带石墨电极。使用3g / L葡萄糖在设计的合成废水中使用3克/ L葡萄糖的四种组合操作，作为阳极电解液作为阴极电解液，用四种电极组合操作。 C / C复合作为阴极和石墨作为阳极（MFC-GC）相对较高的功率密度（0.37W / m（2））和电流（2a / m（2））而不是其他配置。改进的氧化还原率（ORR）动力学在MFC-GC中能够相对于C / C复合电极的元素和表面官能团使得MFC-GC中的更高的生物电解活性。生物电化学分析显示电荷转移电容和电子通量增加，同时降低了MFC-GC中的系统损耗。 C / C复合电极作为阴极由于存在较高的氧官能团和表面性能而增加，在MFC操作期间增加了氧化还原速率动力学朝向更高的能量输出。

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  • 来源
    《Fuel》 |2021年第2期|119273.1-119273.10|共10页
  • 作者

    Sravan J. Shanthi; Raunija Thakur Sudesh Kumar; Verma Anil; Mohan S. Venkata;

  • 作者单位

    CSIR Indian Inst Chem Technol CSIR IICT Dept Energy & Environm Engn DEEE Bioengn & Environm Sci Lab Hyderabad 500007 Andhra Pradesh India|Acad Sci & Innovat Res AcSIR Ghaziabad 201002 India;

    Indian Inst Technol Delhi Dept Chem Engn Sustainable Environergy Res Lab SERL New Delhi 110016 India|Semicond Lab VFD Qual Control Div Sas Nagar 160071 Punjab India;

    Indian Inst Technol Delhi Dept Chem Engn Sustainable Environergy Res Lab SERL New Delhi 110016 India;

    CSIR Indian Inst Chem Technol CSIR IICT Dept Energy & Environm Engn DEEE Bioengn & Environm Sci Lab Hyderabad 500007 Andhra Pradesh India|Acad Sci & Innovat Res AcSIR Ghaziabad 201002 India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bioelectricity; Electrocatalysis; Impedance; Oxidation-reduction reaction (ORR); Biofilm; Microbial electrochemical technology;

    机译：生物电;电催化;阻抗;氧化还原反应（ORR）;生物膜;微生物电化学技术;

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