Gas as catalyst

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Material Reaction with heat or chemicals
PTFE High temperatures cause thermal decomposition; it is not an ordinary fuel.
Nomex Can thermally decompose and char under extreme heat.
Kevlar Can decompose under extreme heat; it is not an ignition chemical.
Perovskite oxides Can catalyse oxidation and other chemical reactions.
Cyanobacteria Use light for photosynthesis and can produce hydrogen in specialised research systems.

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