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Iron oxide

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Posted by Ed Ferris on September 7, 2008, 11:45 pm
There is some research on record about using iron oxide as an immersed
semiconductor for photoelectrolytic production of hydrogen.  You put it at
the bottom of a pan of water, shine light on it, and hydrogen starts
bubbling up.  The band gap is given as 2V to 2.2V, depending on how much is
ferrous and how much ferric or what other dopants are added.

So there's the band gap, quite practical for photovoltaics.  Still haven't
found an example of a rust/iron PV cell.

Posted by Eeyore on September 8, 2008, 2:17 am

Ed Ferris wrote:

Have you tried doing this ? Maybe then you might shut up.


Posted by Ed Ferris on September 8, 2008, 4:37 pm

If you look it up through Google, you'll find that it's a bit more
complicated:  the experimenters sintered iron oxide doped with a rare earth
oxide at 1200 degrees for ten hours and then immersed the ceramic in water,
illuminated it, and got hydrogen.
My point is that iron oxide displays a PV effect.
My point in posting here was to get info on past work with iron and iron
oxides or an explanation (if one exists) of why it wouldn't work like the
old Geiger cuprous oxide cell.  Apparently this group doesn't have any
physicists participating.

Posted by Eeyore on September 8, 2008, 5:52 pm

Ed Ferris wrote:

So SHUT UP then.


Posted by jp838 on September 8, 2008, 7:26 pm

Graham is insulting everybody here for at least 18 months.
Sometime I think he works for an oil company but I doubt
they would employ someone like him.

I found your posts very interesting but can't add anything.


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