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Related Concept Videos

Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
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...
Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
Controlled-Current Coulometry: Overview01:27

Controlled-Current Coulometry: Overview

Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...

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Related Experiment Video

Updated: May 23, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

Ion-Exchange Membranes Prevent Nanobubble Detachment But Do Not Limit Electrolysis Current.

Yamila A Perez Sirkin1,2,3, Esteban D Gadea1, Kaixin Wang1

  • 1Department of Chemistry, The University of Utah, Salt Lake City, Utah 84112-0850, United States.

ACS Applied Materials & Interfaces
|May 21, 2026
PubMed
Summary
This summary is machine-generated.

Nanobubble confinement near membranes in electrolyzers anchors bubbles, maintaining hydrogen evolution efficiency. This proximity can also accelerate membrane degradation, offering insights for improved durability.

Keywords:
bubble managementelectrochemical interfaceselectrolyzer efficiencygas evolutionmembrane durability

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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
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Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

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Related Experiment Videos

Last Updated: May 23, 2026

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
07:55

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device

Published on: July 20, 2021

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

Area of Science:

  • Electrochemical Engineering
  • Materials Science
  • Nanotechnology

Background:

  • Gas bubble evolution at electrochemical interfaces is crucial for electrolyzer performance and durability.
  • Resolving nanobubble dynamics at the nanoscale remains a significant challenge.

Purpose of the Study:

  • To investigate potential-dependent nanobubble nucleation, confinement, and dynamics on platinum nanoparticles within confined membrane-electrode gaps.
  • To elucidate the impact of ion-exchange membrane proximity on nanobubble behavior and electrolyzer performance.

Main Methods:

  • Reactive molecular simulations at constant potential were employed.
  • Nanoscale bubble nucleation, confinement, and steady-state dynamics were resolved on platinum nanoparticles.

Main Results:

  • Membrane proximity anchors nanobubbles on platinum nanoparticles, preventing detachment and maintaining hydrogen evolution currents.
  • Ionomer adsorption reduces current via active-site occlusion and enhances electroactive-area screening.
  • Anchored nanobubbles create dehydrated regions at the membrane interface, potentially accelerating degradation.

Conclusions:

  • Membrane proximity governs nanobubble confinement without compromising efficiency, serving as a design parameter for electrolyzer durability.
  • Understanding nanoscale bubble morphology and catalytic area is key to managing durability in electrolysis systems.