Which consequence arises when exceeding the maximum allowed concentration of dissolved oxygen molecules within a polymer electrolyte membrane fuel cell?

💡 Explanation

Excessive dissolved oxygen drives accelerated platinum dissolution via oxidative corrosion because the Pt atoms readily form soluble oxides. Therefore the catalyst degrades faster, rather than increased resistance developing at the electrodes; that is tied to water management issues.

• Which outcome results in steel bridge girders when increased grain boundary surface area limits dislocation movement?
• Which outcome occurs when a substance undergoes an adiabatic phase transition?
• Which consequence results when strong intermolecular forces dominate?
• Which outcome occurs when a waveguide's dimensions approach wavelength?
• Which mechanism causes localized *p*-type doping in germanium crystals grown by Czochralski method with gallium contamination?
• Which mechanism causes erratic control valve behavior when liquid entering flashes to vapor?