Catalytic Converter Demand in the EV Transition: Platinum's Largest Market at a Crossroads

The simple version says EVs kill platinum. The detailed version says hybrids, heavy-duty diesel, and tightening Euro 7 standards may keep autocatalyst demand resilient through 2035.

The Autocatalyst Demand Stack

Roughly 40% of platinum demand comes from autocatalysts, with another 30%+ for palladium going to the same end use. The function is identical: convert NOx, CO, and unburned hydrocarbons into less harmful gases. Diesel engines historically used platinum-heavy formulations, while gasoline engines leaned palladium.

Why The Death of ICE Is Slower Than Headlines Suggest

• Hybrids still require full catalyst systems and are growing faster than pure BEVs in many markets
• Heavy-duty trucks and buses will remain ICE-dominant well into the 2030s
• Euro 7, China 6b, and India BS-VI Phase 2 raise loadings per vehicle
• Used vehicle fleets retain catalysts for 15+ years after sale
• Substitution from palladium back to platinum is accelerating

"Even in our most aggressive EV penetration scenario, total PGM autocatalyst demand only declines around 1% per year through 2030. The fleet effect is enormous." - Johnson Matthey market briefing

The Substitution Tailwind

From 2018 through 2022, palladium traded at a punishing premium to platinum, peaking near $3,440 per ounce. Automakers responded with multi-year R&D programmes to substitute platinum for palladium in three-way catalysts. By 2024, those programmes were producing measurable volume shifts, with some estimates putting substitution at 500,000-700,000 ounces annually and rising.

This is structural, not cyclical. Engineering changes to catalyst formulations are not reversed when prices move. Once a vehicle platform is qualified on a platinum-rich recipe, that recipe sticks for the model's lifetime.

Heavy-duty applications add another tailwind. Diesel emissions standards keep tightening globally, and the only way to meet them is more PGM loading. China VI heavy-duty rules alone added meaningful platinum demand even as light-vehicle BEV share rose.

The bear case is real but often overstated. If light-vehicle BEV share globally hits 50% by 2030, that is roughly 35 million vehicles per year not buying catalysts, which equals around 1.5-2 million PGM ounces of demand destruction. Hybrids and HDV growth offset most of that in current models. The deficit, if any, is gradual.

For investors, the implication is that the autocatalyst story is not a falling knife. It is a slow-moving plateau with substitution support underneath it. Platinum's exposure to this segment is now arguably less risky than palladium's, which is a complete inversion of the 2018 narrative.

Bottom line: the EV transition is real, but its impact on platinum demand is being delayed and partially offset by substitution and tighter emissions rules. Anyone modelling autocatalyst demand should run multiple scenarios, not assume linear decline. The market is pricing in a worst case that the engineering does not support.