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Re: Oxalic acid
> > Second, what material
> > could be used for the electrode to prevent formation of oxalate? Coal?
> > (it is hard to find a coal electrode of decent size to provide
> > sufficient current density).
> Graphite would be the obvious choice, as it is pretty inert.
Graphite could probably be acquired from a theatrical lighting supply house
in the form of electrodes for carbon-arc lights (very old technology
though, might be hard to find). Titanium is also pretty inert, and should
be more durable as well as easier to find (http://www.onlinemetals.com).
Just get some titanium rods, and either thread the ends or drill and tap
holes in the ends (depending on the size of the rod) to connect wires.
> > Would silver be of any use?
> Not for the positive electrode:
> Ag -> Ag+ + e-
Might also be cheaper to just use gaseous CO2 in cannisters at this point ;-)
> I would get graphite electrodes, or one graphite electrode to
>act as the positive one. I would probably cut the voltage somewhat
>and stir the cell contents.
I would think graphite would be too brittle to easily work with.
I would suggest maybe a teflon container too to allow easy cleaning.
Polyethylene would probably be a useable inexpensive substitute if you're
only planning on running low temperatures in your reaction vessel.
UNIX Systems Administrator