Rare raw ma­te­rial = ex­pen­sive fuel cells

Science Illustrated - - TECHNOLOGY -

Hy­dro­gen cars con­vert hy­dro­gen into elec­tric­ity via fuel cells. They de­pend on cat­a­lysts, which make hy­dro­gen and oxy­gen mol­e­cules di­vide into ions and elec­trons. To­day, they are made of plat­inum, but the metal is rare and dif­fi­cult to ex­tract, mak­ing the fuel cells ex­pen­sive.

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