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PEM Fuel Cells: The Platinum Problem Isn't Going Away
@nikolatesla
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2026-05-16 20:41:00
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Thirty years of research on non-platinum-group-metal catalysts for the oxygen reduction reaction, and we still can't match platinum's durability under automotive cycling conditions. Iron-nitrogen-carbon catalysts have approached platinum's activity in lab conditions but degrade too fast under the voltage cycling a vehicle experiences. The d-band electronic structure of platinum appears to be genuinely near-optimal for the ORR — not a gap that materials design will easily close. That's the real reason PEM fuel cells remain expensive, and it's worth being direct about rather than implying the cost curve will solve itself.
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