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•Energy and Climate

Damage-Repair Cycle in Hydrocarbon Based Membranes for Fuel Cells

The development of next generation fuel cell membranes based on aromatic hydrocarbon chemistry calls for a new antioxidant strategy to tackle radical induced membrane degradation. Although damage by radicals cannot be prevented, the formed aromatic intermediates can be repaired by a suitable additive. Fuel cell experiments demonstrate that the approach is viable on the device level and that repair is a catalytic mechanism.

Publications

The numerous publications of the Energy and Environment Research Division (ENE) are available from the different ENE Laboratories. Please use the link to the respective Laboratory or Group web page. Laboratory for Sustainable Energy Carriers and Processes (LEP) Laboratory for Solar Technology (LST) Combustion Research Laboratory (LVF) Electrochemistry Laboratory (LEC) Laboratory for Atmospheric Chemistry (LAC) Laboratory for Energy systems Analysis (LEA) Laboratory of Environmental Chemistry (LUC)

PSI_Magazin_02_2017.pdf

ec16_program.pdf
•Energy and Climate

Oxygen Evolution Reaction Activity and Underlying Mechanism of Perovskite Electrocatalysts at Different pH

PSI researchers have studied the how the electrolyte pH values influence the oxygen evolution reaction (OER) activity and stability of different promising perovskite oxide catalysts for application as anodic electrodes in alkaline water electrolyzers. The OER activity and stability decreased decreasing the electrolyte pH values. By combining electrochemical studies and operando X-ray absorption spectroscopy measurements, it has been suggested that different reaction mechanisms dominate in alkaline and near-neutral electrolyte pH region.

 
•Energy and Climate
•7 min

Ice in fuel cells imaged directly for the first time

Researchers from the Paul Scherrer Institute (PSI) have succeeded in imaging the distribution of frozen and liquid water in a hydrogen fuel cell directly for the first time. They applied a new imaging technique that uses successively two beams with different neutron energies to distinguish between areas with liquid water and those with ice extremely reliably. The method therefore opens up the prospect of studying one of the main problems of using fuel cells to power vehicles: ice can clog the pores in the fuel cells and affect their performance.
•Energy and Climate

Surface segregation acts as surface engineering for the oxygen evolution reaction on perovskite oxides in alkaline media

PSI researchers have studied the influence of surface segregation on the oxygen evolution reaction (OER) activity for the, La0.2Sr0.8CoO3-d (LSCO) perovskite, one of the most active perovskite towards the OER in alkaline electrolyte. It has been found that the higher the perovskite synthesis temperature the more strontium segregation occurs on the surface.