Frédéric Hasché
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View article: Water Crossover in Proton Exchange Membrane Water Electrolysis
Water Crossover in Proton Exchange Membrane Water Electrolysis Open
Water management is critical for high performance of polymer electrolyte membrane water electrolysis (PEMWE). In this work, we investigated the water crossover for 5 cm 2 PEMWE single cell by varying the temperature (40–80 °C), current den…
View article: Advanced design of electrospun nanofiber cathode catalyst layers for PEM fuel cells at low humidity
Advanced design of electrospun nanofiber cathode catalyst layers for PEM fuel cells at low humidity Open
Electrospinning has emerged as a very promising preparation method of PEMFC cathode catalyst layers (CCLs) with high performance in the mass transport region due to their unique network structure for water transport and O2 accessibility. W…
View article: Regeneration Strategies for Ruthenium-Poisoned ORR Catalysts in Reformate PEM Fuel Cells
Regeneration Strategies for Ruthenium-Poisoned ORR Catalysts in Reformate PEM Fuel Cells Open
PEM fuel cells operating on reformate gases suffer from Ru crossover and its re-deposition in the cathode catalyst layer. Therefore, strategies for regeneration of Ru-poisoned ORR catalysts are needed. Here, we developed a regeneration pro…
View article: Towards a Harmonized Accelerated Stress Test Protocol for Fuel Starvation Induced Cell Reversal Events in PEM Fuel Cells: The Effect of Pulse Duration
Towards a Harmonized Accelerated Stress Test Protocol for Fuel Starvation Induced Cell Reversal Events in PEM Fuel Cells: The Effect of Pulse Duration Open
Global fuel starvation is an undesired event during fuel cell operation that results in serious degradations at the anode catalyst layer caused by the concomitant reversal of the cell potentials. Several groups have therefore intensified t…
View article: PEM Fuel Cell Start-Up/Shut-Down Losses vs Relative Humidity: The Impact of Water in the Electrode Layer on Carbon Corrosion
PEM Fuel Cell Start-Up/Shut-Down Losses vs Relative Humidity: The Impact of Water in the Electrode Layer on Carbon Corrosion Open
For automotive applications, one of the main challenges for proton exchange membrane fuel cells (PEMFCs) is to increase the lifetime of membrane electrode assemblies (MEAs), especially during transient operating conditions such as start-up…
View article: Monometallic Palladium for Oxygen Reduction in PEM Fuel Cells: Particle-Size Effect, Reaction Mechanism, and Voltage Cycling Stability
Monometallic Palladium for Oxygen Reduction in PEM Fuel Cells: Particle-Size Effect, Reaction Mechanism, and Voltage Cycling Stability Open
In this experimental study, we determine the size dependent activity as well as accelerated voltage cycling stability of various carbon supported palladium electrocatalysts for the oxygen reduction in acidic medium. Furthermore, ex-situ tr…
View article: Influence of the Gas Diffusion Layer Compression on the Oxygen Transport in PEM Fuel Cells at High Water Saturation Levels
Influence of the Gas Diffusion Layer Compression on the Oxygen Transport in PEM Fuel Cells at High Water Saturation Levels Open
The impact of the gas diffusion layer (GDL) compression on the oxygen transport is investigated in single cell assemblies at 50°C, RH = 77%, 200 kPaabs and under differential flow conditions. For this, the oxygen transport resistance at lo…
View article: Impact of Hydrogen Bleeding into the Cathode Feed of a PEM Fuel Cell
Impact of Hydrogen Bleeding into the Cathode Feed of a PEM Fuel Cell Open
Hydrogen bleeding into the cathode inlet of a proton exchange membrane (PEM) fuel cell could be a simple approach to reduce the H2 concentration in the fuel cell exhaust during transient operating conditions (e.g., start-up or fast transie…
View article: PEM Fuel Cell Start-up/Shut-down Losses vs Temperature for Non-Graphitized and Graphitized Cathode Carbon Supports
PEM Fuel Cell Start-up/Shut-down Losses vs Temperature for Non-Graphitized and Graphitized Cathode Carbon Supports Open
One of the key figures for the success of proton exchange membrane fuel cells (PEMFCs) in automotive applications is lifetime. Damage of the cathode carbon support, induced by hydrogen/air fronts moving through the anode during start-up/sh…
View article: Voltage Cycling Induced Losses in Electrochemically Active Surface Area and in H<sub>2</sub>/Air-Performance of PEM Fuel Cells
Voltage Cycling Induced Losses in Electrochemically Active Surface Area and in H<sub>2</sub>/Air-Performance of PEM Fuel Cells Open
The influence of voltage cycling profiles on the degradation of MEAs (membrane electrode assemblies) for PEM (proton exchange membrane) fuel cells was investigated using MEAs with carbon supported catalysts. The loss of electrochemically a…