Hydrogen Round-Trip Energy Context

What this topic covers

Why electricity-to-hydrogen-to-electricity is a chain of efficiencies.

Core energy-system ideas

Electrolysis converts electricity into hydrogen and fuel cells convert hydrogen back to electricity.

Each conversion has losses, plus storage and balance-of-plant energy.

Platinum can improve catalyst performance but cannot eliminate thermodynamic and system losses.

Important tradeoffs

Platinum intensity and lifetime productivity answer different questions.

Material and performance evidence

Price scenarios should use user-entered current assumptions rather than forecasts embedded in the site.

Lifecycle perspective

Supply resilience can improve through lower loading, longer life, recycling and supplier diversity.