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View Diary: Recent DOE Break-Through with Hydrogen Fuel Cells, should make them Affordable (275 comments)

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  •  Hmmm... (0+ / 0-)

    Two statements of yours trouble me:

    "(simply running electricity through salt water makes Hydrogen)"

    You end up with serious corrosion problems from all that salt.

    "Hydrogen molecules (H2) as a gas are small and very corrosive"

    I don't think that corrosiveness is the issue; we handle far more corrosive materials all the time. It's true that the small size of hydrogen molecules makes it easier for them to penetrate a number of materials, but I can't imagine that this problem cannot be solved with a thin but tight (on the molecular level) coating. Can you direct me to a source on this problem?

    •  Sorry for the late reply (1+ / 0-)
      Recommended by:
      Odysseus

      1) Conductive ceramics can handle the salt corrosion, actually a thin layer of industrial diamond coating can do it also, or nickel alloys.

      2) As for the corrosion issue it's more serious than you think. Remember acids are basically a proton donating molecule. Protons donations are basically charged hydrogen atoms. Hydrogen gas is basically an acid waiting to happen if it get's any source of heat, or friction. As for a thick layer on the molecular level for storage, diatomic hydrogen is simply the smallest molecule possible. You would need to serious compress any other molecule in order to make the spaces small enough to prevent diatomic hydrogen from escaping. Or you need to liquefy hydrogen.

      Wikipedia is a great first step for these types of issue.

      The problems theoretically are solvable but the research money hasn't been placed there (yet)

      BTW I'm a chemical engineer and I interned at a department of energy program many, many moons ago.

      -1.63/ -1.49 "Speaking truth to power" (with snark of course)!

      by dopper0189 on Sun Apr 24, 2011 at 11:45:21 AM PDT

      [ Parent ]

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