Related Experiment Video
Updated: Sep 10, 2025
06:39
Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
Published on: October 20, 2023
3.2K
Overcoming Hydrogen Losses in Fuel Cells: A Membrane-based Approach to Sustainable Energy
Hossein Pourrahmani1, Timur Ashirov2, Ali Coskun3
1Department of Chemistry, University of Fribourg, Fribourg, CH-1700, Switzerland. hossein.pourrahmani@unifr.ch.
Chimia
|August 21, 2025
Summary
Hydrogen fuel cells offer a clean energy solution, but unreacted hydrogen losses during operation hinder efficiency. Innovative recovery systems, like the SEPARATIC-H2 membrane, can minimize waste and boost performance for a sustainable future.
Area of Science:
- Energy science
- Environmental science
- Materials science
Background:
- Hydrogen (H2) is a promising zero-carbon fuel for energy transition.
- Fuel cells efficiently convert H2 to electricity, producing only water.
- Widespread H2 adoption faces challenges: production, transport, and operational losses.
Purpose of the Study:
- To explore hydrogen fuel cell fundamentals and operational challenges.
- To investigate hydrogen purge losses and their environmental impact.
- To examine solutions for minimizing hydrogen waste in fuel cell systems.
Main Methods:
- Review of hydrogen fuel cell technologies and energy conversion principles.
- Analysis of hydrogen purge loss mechanisms and their effect on efficiency.
- Evaluation of potential mitigation strategies, including catalytic burning and recirculation.
- Case study of the SEPARATIC-H2 membrane for hydrogen recovery.
Main Results:
- Hydrogen purge losses significantly impact fuel cell efficiency and durability.
- Existing solutions like catalytic burning and recirculation offer partial mitigation.
- The SEPARATIC-H2 membrane demonstrates potential for enhanced H2 recovery.
- Minimizing H2 waste is crucial for realizing hydrogen's full potential.
Conclusions:
- Addressing hydrogen purge losses is vital for efficient and sustainable fuel cell operation.
- Innovative technologies like advanced membranes are key to reducing H2 waste.
- Optimizing hydrogen utilization accelerates the transition to a low-carbon energy future.
Related Concept Videos
03:12Batteries and Fuel Cells
28.0K
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...
28.0K
02:13Reduction of Alkenes: Catalytic Hydrogenation
12.5K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.5K
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.4K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.4K
01:25Lipid Catabolism
165
Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
165
01:15Potentiometry: Membrane Electrodes
786
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...
786
01:30Environmental Applications of Microorganisms
233
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
233