The gas distribution layers (9) in the PEM fuel cell stack are compressed to 25% - 60% of their original thickness.

Gas distributor for polymer electrolyte fuel cells contains 4 layers, comprising a coarsely porous carbon carrier sheet with a porous hydrophobic layer on each side and a contact layer on one of these. Independent claims are also included for: (a) gas diff...

In a polymer electrolyte fuel cell gas distributor with a hydrophobized, laminated carbon carrier with 2 surfaces, one with a contact layer of an intimate mixture of 40-90 wt.% finely-divided carbon particles and hydrophobic polyethylene, polypropylene and...

Testing functionality of nitrogen oxide storage catalyst containing nitrogen oxide storage material, catalyst and optionally oxygen storage material comprises determining nitrogen oxide storeability of catalyst to determine damage to it at exhaust gas temp...

In the catalytic conversion of carbon monoxide (CO) in a gas mixture containing water to carbon dioxide (CO2) and hydrogen (H2) (CO conversion) by passing the gas mixture over a shift catalyst at the temperature for CO conversion, the shift catalyst is bas...

Process for testing the functionality of a catalyst used for purifying IC engine exhaust gas during operation of the engine comprises equipping the engine with an electronic on-board diagnostics system; and determining the difference DELTA T of the actual ...