Proton Exchange Membrane Fuel Cells
Proton Exchange Membrane Fuel Cells - 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.
15:08
Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
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Cited by 4 •
2012
We present a unique platform for characterizing electrode surfaces in solid oxide fuel cells (SOFCs) that allows simultaneous performance of multiple characterization techniques (e.g. in situ Raman spectroscopy and scanning probe microscopy alongside electrochemical measurements). Complementary information from these analyses may help to advance toward a more profound understanding of electrode reaction and degradation mechanisms, providing insights into rational design of better materials for...
03:12
Batteries and Fuel Cells
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2020
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
08:16
Combustion Characterization and Model Fuel Development for Micro-tubular Flame-assisted Fuel Cells
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Cited by 13 •
2016
A protocol for creating a model fuel-rich combustion exhaust is developed through combustion characterization and is applied for micro-tubular flame-assisted fuel cell testing and research.
FAQs
The membrane creates two separate charge pathways inside the cell. Protons can move through it from the hydrogen side to the oxygen side, while electrons must travel through the external circuit instead. This directed electron flow produces usable electrical current, making membrane selectivity central to both electricity generation and the cell’s operating mechanism.
Catalyst durability influences how consistently the electrochemical reactions can proceed over the cell’s service life. If durability declines, the system may deliver less reliable performance and its overall environmental benefits can change. For environmental assessment, researchers therefore consider not only efficiency and emissions during operation, but also how long the catalytic components remain effective.
Water and heat are the main products released during cell operation, and point-of-use emissions are low. However, the broader environmental outcome also depends on how the hydrogen is produced. Hydrogen production methods can therefore determine whether the clean operation of Proton Exchange Membrane Fuel Cells translates into a larger overall environmental advantage.
Operation requires hydrogen at the anode, oxygen at the cathode, catalysts at the reaction sites, and a proton-conducting membrane between the electrodes. The resulting electrons pass through an external circuit, while protons cross the membrane and ultimately participate in water formation. Coordinating these components supports electricity production with water and heat as the main byproducts.
Their combination of high efficiency and low point-of-use emissions supports several applications, including zero-emission transportation and backup power. These uses allow researchers to examine how fuel cells can provide electricity while limiting emissions at the place of use. Environmental studies can then compare the benefits of these applications with the impacts associated with hydrogen production and component durability.
Renewable hydrogen integration connects fuel-cell electricity generation with energy produced from renewable sources. In that context, researchers can study how hydrogen serves as part of a clean-energy system rather than evaluating the fuel cell in isolation. The resulting environmental assessment still depends on the hydrogen production method and on maintaining catalyst durability over the system’s use.