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Microbial Corrosion01:24

Microbial Corrosion

Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
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Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...

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一种基于纳米纤维的气体扩散层,用于提高空气阴极微生物燃料电池的性能.

Giulia Massaglia1,2, Tommaso Serra1,2, Fabrizio Candido Pirri1,2

  • 1Department of Applied Science and Technology, Politecnico of Turin, Corso Duca degli Abruzzi 29, 10129 Torino, Italy.

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概括

研究人员开发了一种用于微生物燃料电池的新型纳米结构气体扩散层 (纳米GDL). 这项创新显著提高了空气阴极单微生物燃料电池 (a-SCMFC) 的功率输出和能量回收.

关键词:
电力旋转是指电力旋转.燃料电池燃料电池的使用情况气体扩散层是一种气体扩散层.激光诱导的纳米材料微生物燃料电池是一种微生物燃料电池.氧降解反应是氧降解反应.三相的边界是三相的边界.

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科学领域:

  • 能源转化和储存 能源转化和储存
  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学

背景情况:

  • 微生物燃料电池 (MFC) 提供了可持续的能源,但它们的性能往往受到低效的氧气减排的限制.
  • 气体扩散层 (GDL) 是MFC中的关键组件,促进氧气运输和水的管理.
  • 传统的GDL在优化氧气扩散和防止电解质泄漏方面面临挑战,阻碍了MFC的效率.

研究的目的:

  • 开发和评估一种新的纳米结构气体扩散层 (纳米-GDL),以提高空气阴极单微生物燃料电池 (a-SCMFC) 的性能.
  • 改进a-SCMFCs的氧降解反应动力学和总体能量输出.
  • 创建一个GDL,为高效的水资源管理和天然气运输提供量身定制的属性.

主要方法:

  • 使用聚乙烯二化物 (PVDF) 和纤维素纳米纤维直接在碳基电极上电制造纳米GDL.
  • 双层纳米GDL的设计:一个防水的PVDF外层和一个透气的纤维素内部层.
  • 使用新型纳米GDL进行a-SCMFC的性能测试,并将其与基于PTFE的标准GDL进行比较.

主要成果:

  • 纳米GDL显著提高了a-SCMFCs的最大电流密度,达到132.2 ± 10.8 mA m-2 ,是标准GDL (58.5 ± 2.4 mA m-2) 的两倍多.
  • 使用纳米GDL的a-SCMFCs的能量回收 (EF) 系数为60.83mJ m−3,比使用标准GDL获得的3.92mJ m−3高出一个数量级.
  • 纳米结构设计有效地平衡了水资源管理和氧气供应,促进了高效的直接氧气减少.

结论:

  • 开发的纳米GDL代表了对a-SCMFCs的GDL技术的重大进步.
  • 纳米-GDL独特的纳米结构和材料组成使得发电和能源效率大大提高.
  • 这种方法为优化微生物燃料电池和其他电化学设备的性能提供了一个有希望的策略.