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Updated: May 23, 2026
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
Summary
Nanobubble confinement near membranes in electrolyzers anchors bubbles, maintaining hydrogen evolution efficiency. This proximity can also accelerate membrane degradation, offering insights for improved durability.
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.
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