Fabian Scheepers
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View article: Enhancing Reproducibility and Uniformity of RDEs: Spray-Coating vs Drop-Casting for IrO<sub><b>2</b></sub> OER Catalyst
Enhancing Reproducibility and Uniformity of RDEs: Spray-Coating vs Drop-Casting for IrO<sub><b>2</b></sub> OER Catalyst Open
View article: Innovative Method for Reliable Measurement of PEM Water Electrolyzer Component Resistances
Innovative Method for Reliable Measurement of PEM Water Electrolyzer Component Resistances Open
Understanding the sheet resistance of porous electrodes is essential for improving the performance of polymer electrolyte membrane (PEM) water electrolyzers and related technologies. Despite its importance, existing methods often fail to p…
View article: Investigating the Applicability of the Tafel Equation in Polymer Electrolyte Membrane Electrolyzers via Statistical Analysis
Investigating the Applicability of the Tafel Equation in Polymer Electrolyte Membrane Electrolyzers via Statistical Analysis Open
Analyzing PEM electrolyzer polarization curves via voltage breakdown analysis involves decomposing contributions from underlying processes, typically based on the assumption of reaction kinetics that may be expressed by means of the Tafel …
View article: Oxygen flow rate measurement as a whistleblower for degradation effects in PEM water electrolysis
Oxygen flow rate measurement as a whistleblower for degradation effects in PEM water electrolysis Open
This study introduces analyzes a slow-growing degradation effect that can occur when using thin catalyst-coated membranes for PEM water electrolysis. The electric current through a test cell increased during experiments in potentiostatic o…
View article: Ternary Zn-Ce-Ag catalysts for selective and stable electrochemical CO2 reduction at large-scale
Ternary Zn-Ce-Ag catalysts for selective and stable electrochemical CO2 reduction at large-scale Open
Catalyst materials with high stability and selectivity, based on inexpensive materials, are vital for practical electrochemical carbon dioxide (CO2) reduction (ECR). In this study, we report ternary Zn-Ce-Ag catalysts for selective and sta…
View article: System dynamics of polymer electrolyte membrane water electrolyzers and impact of renewable energy sources on systems design
System dynamics of polymer electrolyte membrane water electrolyzers and impact of renewable energy sources on systems design Open
Water electrolyzers will ensure energy security and power grid stability in energy systems based on fluctuating renewable energy sources such as wind power and photovoltaics. In this article, the effects of volatile energy generation on th…
View article: Comparative Analysis and Error Assessment of Nanoindentation Evaluation Techniques for NafionTM117
Comparative Analysis and Error Assessment of Nanoindentation Evaluation Techniques for NafionTM117 Open
Advances in the application of polymers for electrochemical cells require an understanding of their viscous deformation mechanisms and their interaction with moisture. Nanoindentation offers a localized, microscale testing alternative to t…
View article: Stability of Ni–Fe‐Layered Double Hydroxide Under Long‐Term Operation in AEM Water Electrolysis
Stability of Ni–Fe‐Layered Double Hydroxide Under Long‐Term Operation in AEM Water Electrolysis Open
Anion exchange membrane water electrolysis (AEMWE) is an attractive method for green hydrogen production. It allows the use of non‐platinum group metal catalysts and can achieve performance comparable to proton exchange membrane water elec…
View article: Advances in benchmarking and round robin testing for PEM water electrolysis: Reference protocol and hardware
Advances in benchmarking and round robin testing for PEM water electrolysis: Reference protocol and hardware Open
View article: Self-Standing, Ultrasonic Spray-Deposited Membranes for Fuel Cells
Self-Standing, Ultrasonic Spray-Deposited Membranes for Fuel Cells Open
The polymer electrolyte membrane and its contact with electrodes has a significant effect on the performance of fuel and electrolysis cells but the choice of commercially available membranes is limited. In this study, membranes for direct …
View article: Cost-optimized design point and operating strategy of polymer electrolyte membrane electrolyzers
Cost-optimized design point and operating strategy of polymer electrolyte membrane electrolyzers Open
Green hydrogen is a key solution for reducing CO2 emissions in various industrial applications, but high production costs continue to hinder its market penetration today. Better competitiveness is linked to lower investment costs and highe…
View article: Favorable Start-Up behavior of polymer electrolyte membrane water electrolyzers
Favorable Start-Up behavior of polymer electrolyte membrane water electrolyzers Open
Dynamically-operated water electrolyzers enable the production of green hydrogen for cross-sector applications while simultaneously stabilizing power grids. In this study, the start-up phase of polymer electrolyte membrane (PEM) water elec…
View article: Scalable Implementation of Recombination Catalyst Layers to Mitigate Gas Crossover in PEM Water Electrolyzers
Scalable Implementation of Recombination Catalyst Layers to Mitigate Gas Crossover in PEM Water Electrolyzers Open
Hydrogen permeation across the membrane is a critical safety hurdle within polymer electrolyte membrane (PEM) water electrolysis (WE). It is crucial to implement recombination catalysts into the membrane electrode assemblies (MEAs) for red…
View article: The Effect of Cell Compression and Cathode Pressure on Hydrogen Crossover in PEM Water Electrolysis
The Effect of Cell Compression and Cathode Pressure on Hydrogen Crossover in PEM Water Electrolysis Open
Hydrogen crossover poses a crucial issue for polymer electrolyte membrane (PEM) water electrolysers in terms of safe operation and efficiency losses, especially at increased hydrogen pressures. Besides the impact of external operating cond…
View article: Challenges and important considerations when benchmarking single-cell alkaline electrolyzers
Challenges and important considerations when benchmarking single-cell alkaline electrolyzers Open
This study outlines an approach to identifying the difficulties associated with the benchmarking of alkaline single cells under real electrolyzer conditions. A challenging task in the testing and comparison of different catalysts is obtain…
View article: Temperature optimization for improving polymer electrolyte membrane-water electrolysis system efficiency
Temperature optimization for improving polymer electrolyte membrane-water electrolysis system efficiency Open
Most of the hydrogen produced today is made using fossil fuels, making a significant contribution to global CO2 emissions. Although polymer electrolyte membrane water-electrolyzers can produce green hydrogen by means of excess electricity …
View article: Improving the Efficiency of PEM Electrolyzers through Membrane-Specific Pressure Optimization
Improving the Efficiency of PEM Electrolyzers through Membrane-Specific Pressure Optimization Open
Hydrogen produced in a polymer electrolyte membrane (PEM) electrolyzer must be stored under high pressure. It is discussed whether the gas should be compressed in subsequent gas compressors or by the electrolyzer. While gas compressor stag…
View article: Reusability of decal substrates for the fabrication of catalyst coated membranes
Reusability of decal substrates for the fabrication of catalyst coated membranes Open
The use of decal substrates to produce catalyst coated membranes (CCMs) for polymer electrolyte membrane water electrolyzers or fuel cells is a common procedure. For economic and ecological reasons, the reuse of decal substrates would be d…
View article: Quantitative Analyse der Trocknungsverläufe von Katalysatordispersionen
Quantitative Analyse der Trocknungsverläufe von Katalysatordispersionen Open
The production of electrodes for their application in electrolyzers and fuel cells is based on the production of a catalyst-containing, aqueous-alcoholic dispersion. This is processed into a wet layer which, finally, forms the electrode. M…
View article: Layer Formation from Polymer Carbon-Black Dispersions
Layer Formation from Polymer Carbon-Black Dispersions Open
It has been well-established that effects such as cracking are observable when wet layers are dried. In particular, the layer thickness, as well as the surface tension of the liquid, is responsible for this behavior. The layer formation of…
View article: A new setup for the quantitative analysis of drying by the use of gas-phase FTIR-spectroscopy
A new setup for the quantitative analysis of drying by the use of gas-phase FTIR-spectroscopy Open
Drying rates are important for the manufacture of thin films and in specific for the production of electrodes used in electrochemical devices such as fuel cells and electrolyzers. The known procedures to investigate time-dependent sample c…