beergod
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platinum coated mesh/wool
Where can I find some platinum coated wool or mesh? I am looking for something to catalytically ignite hydrogen, I would prefer a fine screen but
wool would work too if its cheaper. I know these screens/meshes are included in butane soldering irons and liquid fuel hand warmers... Ebay and
google turned up surprisingly little, you guys have any tips for me?
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Fleaker
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Make it. H2PtCl6 onto kaowool and then reduce with H2 gas.
Neither flask nor beaker.
"Kid, you don't even know just what you don't know. "
--The Dark Lord Sauron
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beergod
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Can you elaborate on how to get the Chloroplatinic acid onto the wool?
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crystalXclear
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OOPS..MY BAD.
sorry to misslead, not intentional Xtal
[Edited on 19-4-2011 by crystalXclear]
Kaowool is the ceramic thermaly conductive insulation wool, theres a low conductive paper/wrap form it comes in too IIRC.
it can be used with a hardener as a resin catalyst alternative too. It's been a while and I don't remember much about it, but it's verry safe to use
+ up to 790-950 degree temps versatility ta boot.
[Edited on 19-4-2011 by crystalXclear]
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Fleaker
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No, don't electrodeposit.
Make a 0.5 M HCl solution of a known concentration (chloroplatinic acid works for this, but it's an ill defined hydrate often out of the bottle, so
just dissolve a mass of Pt into hot aqua regia and then dilute accordingly), dunk the kaowool in, measure the volume loss due to wicking. Take this
piece and hang it over the solution with a Pt wire hook until it is drip-dry and load into a quartz tube and reduce at 400*C in a stream of hydrogen.
You can of course tare the dry kaowool before, and then get a mass of Pt deposited.
These plugs work quite nice as heterogeneous catalysts.
Neither flask nor beaker.
"Kid, you don't even know just what you don't know. "
--The Dark Lord Sauron
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DJF90
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Fleaker, care to elaborate on what Pt/Kaowool can be used for/what you've used it for? And how it compares to other supported Pt catalysts (e.g. Pt/C,
Pt/Al2O3)?
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beergod
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Any methods not involving a stream of hydrogen gas?
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Fleaker
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Sure, you can reduce it onto the surface with ammonium formate, at pH 6-6.5 at 80*C. Or you can use methanolic borohydride. Or you can use hydrazine
sulfate with ammonia, pH 8, 50*C, amongst others. You can even reduce Pt in solution with hydrogen gas. The best product to be had is that which is
prepared in and cooled under a stream of H2, because it's H2 saturated.
Use it as you would any heterogeneous supported catalyst...bearing in mind that it's on an aluminosilicate and those are usually amphoteric. It's best
used for continuous flow through catalysis (where Pt/C would erode and Pt/Al2O3 long term phase modifies).
Neither flask nor beaker.
"Kid, you don't even know just what you don't know. "
--The Dark Lord Sauron
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Jor
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I have 5 grams of 5% Pt on Kaowool, commercial sample from BDH. Can I use this in organic synthesis or is it only useful for oxidation of various
gasses with oxygen?
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Fleaker
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You can at least try it. I know it works for hydrogenations.
Neither flask nor beaker.
"Kid, you don't even know just what you don't know. "
--The Dark Lord Sauron
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