Nanomaterials describe, in principle, materials of which a single unit is sized (in at least one dimension) between 1 to 1000 nanometres (10−9 meter) but usually is 1 to 100 nm (the usual definition of nanoscale).
A significant amount of EU-funded research and development (R&D) has been devoted to helping regulations and standards organisations normalise an acceptable hydrogen quality for fuel cells.
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