Proton Exchange Membrane
Proton Exchange Membrane - Related Videos
09:40
Proton Exchange Membrane Fuel Cells
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University The United States consumes a large amount of energy – the current rate is around 97.5 quadrillion BTUs annually. The vast majority (90%) of this energy comes from non-renewable fuel sources. This energy is used for electricity (39%), transportation (28%), industry (22%), and residential/commercial use (11%). As the world has a limited supply of these non-renewable sources, the United States (among others) is...
07:38
Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
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Cited by 4 •
2015
The first part of this article shows how to select mutant cell lines expressing vesicular Na+/H+ exchangers at their plasma membrane. The second part provides protocols based on intracellular pH measurements and fast ion uptake, which are used to determine the ion selectivity and the kinetic parameters of these exchangers.
08:52
Ion-Exchange Chromatography
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Ion-exchange chromatography is a type of chromatography that separates analytes based on charge. A column is used that is filled with a charged stationary phase on a solid support, called an ion-exchange resin. Strong cation-exchange chromatography preferentially separates out cations by using a negatively-charged resin while strong anion-exchange chromatography preferentially selects out anions by using a positively-charged...
08:06
Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
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2017
The protocol for a novel ion concentration polarization (ICP) platform that can stop the propagation of the ICP zone, regardless of the operating conditions is described. This unique ability of the platform lies in the use of merging ion depletion and enrichment, which are two polarities of the ICP phenomenon.
07:55
Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
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2021
We demonstrate the fabrication of a reverse electrodialysis device using a cation-exchange membrane (CEM) and anion-exchange membrane (AEM) for power generation.
FAQs
Hydration creates interconnected, water-rich pathways within the polymer, allowing hydrogen ions to move between electrodes. As a result, the membrane’s proton conductivity depends on maintaining conditions that support these pathways. Studying hydration is therefore essential for understanding how effectively the membrane can enable charge transfer in fuel cells and bioelectrochemical systems.
Restricting electron movement keeps electrical charges separated so electrons follow an external circuit rather than crossing directly between electrodes. Limiting other charged or neutral species also helps maintain separation of the reacting regions. This selective behavior allows proton transport to contribute to controlled electrical energy generation instead of short-circuiting the system.
Proton conductivity, hydration, and chemical stability are central performance properties. Conductivity indicates how readily hydrogen ions can move, while hydration supports the water-rich pathways required for that movement. Chemical stability helps the membrane continue functioning under operating conditions. Examining these properties together helps explain differences in energy-conversion effectiveness.
Researchers examine its proton conductivity, hydration behavior, and chemical stability as separate but related performance characteristics. These measurements indicate whether the membrane can support proton movement, preserve its transport pathways, and remain functional over time. The resulting profile helps guide membrane selection for bioelectrochemical systems that connect microbial metabolism with electrode-based energy transfer.
Within a fuel cell, the membrane enables hydrogen ions to move between electrodes while maintaining separation of electrical charges and reactants. Proton movement supports the electrochemical process that produces electricity, whereas electron restriction directs charge through an external pathway. Membrane conductivity and hydration therefore influence how effectively the cell converts chemical energy into electrical power.
In bioelectrochemical systems, these membranes help couple microbial metabolism with energy transfer at electrodes by providing a route for proton movement while preserving separation between system components. Their properties also matter in biological sensor design and sustainable power technologies. Research focuses on improving conductivity, hydration, and chemical stability to support these applications.