Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← ScienceWhich outcome reduces the efficiency of proton exchange membrane (PEM) fuel cells when exposed to high CO concentrations?
A)Electrode surface poisoning increases✓
B)Electrolyte membrane crystallization occurs
C)Catalyst layer delamination accelerates
D)Gas diffusion layer thickness increases
💡 Explanation
Electrode surface poisoning occurs because chemisorption of CO on platinum electrocatalyst sites blocks H₂ adsorption, inhibiting the hydrogen oxidation reaction. Because hydrogen oxidation is required for current platinum performance declines, therefore cell voltaic efficiency drops more than structural degradation.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Science →- Which mechanism causes mode-locking in high-powered industrial lasers?
- Which phenomenon maintains accelerometer precision on a satellite?
- Which outcome results when iterative solutions fail in computational fluid dynamics?
- Which risk increases when a Faraday cage shield's openings exceed skin depth at the excitation frequency?
- Which inefficiency increases when a real Carnot engine increases cycle rate?
- Which effect is reduced through polymer additives within lubrication?