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← ScienceWhich risk increases when high-temperature, solid oxide fuel cell (SOFC) electrolytes partially vitrify?
A)Increased molecular hydrogen fuel crossover✓
B)Elevated thermal shock failure probability
C)Decreased open-circuit voltage generation
D)Augmented catalytic redox reaction efficacy
💡 Explanation
Increased hydrogen crossover occurs because vitrification increases electrolyte permeability. Molecular hydrogen permeates through the amorphous oxide structure. Therefore, fuel crossover rises, rather than improved reactivity because the hydrogen molecules are smaller, and reduced voltage because the electrolyte degrades.
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