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関連する概念動画

Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential ensures...
Processes at Electrodes01:30

Processes at Electrodes

The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
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...
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,...
Electrogravimetric Analysis: Overview01:30

Electrogravimetric Analysis: Overview

Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
10:03

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

圧力駆動型双極性電気化学

Ioana Dumitrescu1, Robbyn K Anand, Stephen E Fosdick

  • 1Department of Chemistry and Biochemistry, Center for Electrochemistry, Center, The University of Texas at Austin, 1 University Station, A5300, Austin, Texas 78712-0165, USA.

Journal of the American Chemical Society
|March 17, 2011
PubMed
まとめ
この要約は機械生成です。

マイクロチャネルの圧力駆動の流れは,外部電力を必要とせずに電気化学反応を動かすことができます. この流れは,銀の電解によって証明されるように,双極電極での反応を駆動するのに十分な,重要なストリーミングポテンシャルを生成します.

さらに関連する動画

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
13:09

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis

Published on: January 6, 2016

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
08:41

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Published on: September 7, 2018

関連する実験動画

Last Updated: Jun 3, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
10:03

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
13:09

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis

Published on: January 6, 2016

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
08:41

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Published on: September 7, 2018

科学分野:

  • 電気化学 電気化学について
  • 流体力学 流体力学
  • マイクロフリウジック

背景:

  • マイクロ流体装置は,電気化学反応のためにしばしば外部からの電源を必要とします.
  • 充電されたチャネル壁は,流体行動と電気現象に影響を与える可能性があります.

研究 の 目的:

  • 圧力駆動の流れだけで,マイクロチャネルにおけるファラダイの電気化学反応を開始し,維持できるかどうかを調査する.
  • 流体フローによるストリーミングポテンシャルの生成と電気化学におけるその応用を実証する.

主な方法:

  • 充電された壁を持つマイクロチャネルを利用します.
  • 流動ポテンシャルを誘導するために,圧力を駆動する流体フローを使用します.
  • 二極電極 (BPE) を使用して,電気化学反応を容易にします.
  • 銀 (Ag) の電解液をアノド反応の証拠として分析する.

主要な成果:

  • 充電されたマイクロチャネル内の溶液の流れは,ボルトの量位のストリーミングポテンシャルを生成します.
  • これらのストリーミングポテンシャルは,BPEでファラダイの電気化学反応を起こすのに十分です.
  • BPEの陽極端からの銀の電解解は,電気化学反応の発生を確認しています.

結論:

  • 圧力駆動フローは,マイクロ流体系における電気化学反応を動かす有効な方法である.
  • このアプローチは,マイクロチャネルにおけるエネルギー効率の高い電気化学アプリケーションのための潜在的な経路を提供します.
  • 流体の流れによって生成されるストリーミングポテンシャルは,電気化学的エネルギー変換のために活用することができます.