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関連する概念動画

Electromotive Force02:36

Electromotive Force

Electricity is generated by either electrons or ions flowing through a solution or a conducting medium. This flow of electrons or specifically electrical charge is defined as an electric current. When electrons move through a wire, they generate an electric current. It can be recalled that in a redox reaction, electrons are lost and gained. In the spontaneous redox reaction of zinc with copper, when zinc is immersed in a copper ion solution, a transfer of electrons from one substance to...
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
Electromotive Force01:02

Electromotive Force

Electromotive force (emf) is the force that causes current to flow from a higher to a lower  potential. The term "electromotive force" is used for historical reasons, even though emf is not a force at all.
Any circuit with a constant current must contain an emf-producing source. Examples of emf sources include batteries, electric generators, solar cells, thermocouples, and fuel cells. All these sources transform energy of some kind (mechanical, chemical, thermal, and so on) into electric...
DC Battery01:21

DC Battery

A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
Electrochemical Cells01:28

Electrochemical Cells

Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
Microbial Fuel Cells01:23

Microbial Fuel Cells

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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Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
09:09

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電気化学的に切り替え,調節可能な出力電力を持つバイオ燃料電池.

Eugenii Katz1, Itamar Willner

  • 1Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

Journal of the American Chemical Society
|May 29, 2003
PubMed
まとめ

この研究では,グルコース酸化を用いた電気交換可能なバイオ燃料電池を導入しています. 細胞は細胞である.

科学分野:

  • バイオ電気化学 バイオ電気化学
  • 再生可能エネルギー技術について
  • マテリアルサイエンス 材料科学

背景:

  • バイオ燃料電池は,エネルギー発電のための持続可能な代替案を提供します.
  • バイオ燃料電池の性能を電気化学的に制御することは,実用的なアプリケーションにとって極めて重要です.
  • 酵素不動化とリドックスメディエーター戦略は,効率的なバイオ燃料電池設計の鍵です.

研究 の 目的:

  • グルコースの酸化に基づいた電気交換・調節可能なバイオ燃料電池を開発する.
  • リドックスメディエーターと酵素を伝導性ポリマーフィルムに統合して性能を向上させる.
  • バイオ燃料電池の動作のオンとオフ状態の間の可逆的な切り替えを実証するために.

主な方法:

  • アノドおよびカトド電極の製造には,Cu2+) -ポリ (アクリル酸) フィルムを使用する.
  • ピロロキノリンキノン (PQQ),フラビンアデニン・ディヌクレオチド (FAD),グルコース酸化酵素 (GOx),サイトクロームc (Cyt c),およびサイトクローム酸化酵素 (COx) の共性結合である.
  • 伝導性を制御し,スイッチセル性能を制御するためにポリマーフィルムの電気化学的還元と酸化.

主要な成果:

  • 105 microA (550 microA cm(-2)) のショート回路電流と120 mVのオープン回路電圧を達成しました.

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  • 外部抵抗1kOmegaで最大抽出出電力は4.3マイクロWである.
  • 電極伝導性のサイクル電気化学的調節により,ONとOFF状態の間の可逆的なスイッチングが実証されています.

    • 結論:

    • 開発されたバイオ燃料電池は,電気スイッチと調節可能な特性を有しています.
    • Cu(2+) -ポリマーフィルムの緩やかな還元プロセスは,出力力の微調整を可能にします.
    • この研究は,制御可能なバイオ燃料電池技術のための有望なプラットフォームを提供します.