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Related Concept Videos

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...
Standard Electrode Potentials03:02

Standard Electrode Potentials

On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
Electrochemistry: Overview01:04

Electrochemistry: Overview

Electrochemistry is the branch of chemistry that studies the relationship between electrical quantities and chemical reactions, particularly oxidation and reduction. Oxidation is the loss of electrons from a substance, whereas reduction refers to the gain of electrons. A substance with a strong electron affinity is called an oxidizing agent (oxidant), and a reducing agent (reductant) is a species that donates electrons. Oxidation and reduction processes are pivotal to electrochemical reactions,...
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...
Bipolar Disorder01:30

Bipolar Disorder

Bipolar disorder is a chronic mental health condition marked by significant mood fluctuations, including episodes of mania and depression. Elevated energy levels, heightened mood or irritability, impulsive behavior, reduced sleep needs, rapid speech, racing thoughts, inflated self-esteem, and distractibility characterize mania. Individuals with bipolar disorder often alternate between depressive and manic states, with periods of emotional stability lasting an average of six months to a year.
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...

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A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
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Published on: February 13, 2017

Bipolar electrochemistry.

Stephen E Fosdick1, Kyle N Knust, Karen Scida

  • 1Department of Chemistry and Biochemistry and the Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, 105 E. 24th St., Stop A5300, Austin, TX 78712-1224 (USA) http://rcrooks.cm.utexas.edu/research/index.html.

Angewandte Chemie (International Ed. in English)
|July 12, 2013
PubMed
Summary
This summary is machine-generated.

Bipolar electrodes (BPEs) enable wireless electrochemical reactions without direct electrical contact. This technology facilitates material synthesis, screening, and the development of mobile microswimmer devices.

Keywords:
electrochemistrymaterials sciencesensors

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Nanotechnology

Background:

  • Bipolar electrodes (BPEs) are conductive materials that facilitate electrochemical reactions at their poles without direct ohmic contact.
  • Applying a voltage to an electrolyte containing a BPE drives oxidation and reduction reactions due to the potential difference between the electrode and solution.

Purpose of the Study:

  • To explore the capabilities of bipolar electrodes for wireless electrochemical applications.
  • To highlight the potential of BPEs in material synthesis, screening, and the development of mobile electrochemical systems.

Main Methods:

  • Immersion of bipolar electrodes in electrolyte solutions.
  • Application of a voltage to induce electrochemical reactions.
  • Utilizing a single DC power supply or battery to control electrode arrays.

Main Results:

  • Demonstration of redox reactions occurring at BPE extremities without direct electrical connection.
  • Facilitation of large electrode array control using a single power source.
  • Enabling wireless material electrosynthesis and screening.
  • Development of mobile BPEs, termed microswimmers, capable of free movement in solution.

Conclusions:

  • Bipolar electrochemistry offers a versatile platform for advanced electrochemical applications.
  • The wireless nature of BPEs simplifies experimental setups and expands possibilities for material discovery.
  • BPEs pave the way for novel applications, including self-propelled microdevices.