• Cellule SPE/PEM platine-iridium vs titane-platine — ingénierie ELITE 9K HYDROGENYX

Why platinum-iridium and not titanium-platinum

Paul Fournier

— WEEKLY EDITION · FRIDAY JUNE 12 —

Titanium-platinum lost torque at pH < 6.5.

Low-end SPE/PEM cells use a platinum-coated titanium (Ti-Pt) electrode. Good conductivity, low cost (~€12/cell).

Problem: at water pH < 6.5 (vinegar, lemon, acidic water), the Pt coating degrades by electrochemical dissolution in 200-400 cycles. The cell loses 30% H₂ production in 6 months.

Asahi Kasei (our cell supplier) uses solid platinum-iridium (Pt-Ir). Cost: ~€74/cell. Resistance to pH < 6.5 tested up to 5,000+ cycles without measurable degradation.

Our cell costs 6× more. It lasts 12× longer. Honest math.

Pt-Ir Asahi Kasei · 5,000+ Cycles tested · 12× vs Ti-Pt

« The cost of a solid platinum-iridium cell is our best proof that we don't do things like the others. »
Paul Fournier · HYDROGENYX Founder

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