Fantasma4500
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PbO2 with graphite, gathering methods?
Recently ive been looking up some ways of manufacturing these infamous PbO2 anodes..
i read about a member of this site's experience with an graphite stick anode to make KClO4, and apparently as he saw it, it could nearly
run forever.
I believe it was Xenoid?
I have now gathered 100g of pure Pb(NO3)2, or well nearly pure..
Pure enough, and a piece of graphite, meant for anode / cathode use.
I have seen different reportings about using graphite substrate for PbO2 anode..
Some reporting it as worthless and never will work, and then theres the nearly invincible graphite PbO2 anode ?''Berta''?
I have looked through a few patents, to see what they would use for PbO2, apparently titanium is used instead of graphite on industrial
levels..
http://imgur.com/TPK9g8U
As seen here, if the picture / link will be visible, i found that they usually use HNO3 aswell as Copper Nitrate, but again, this is for
titanium sheet, i have found on another site in the comments that the ratio should be 100g lead containing salt and 60 grammes of copper salt
the easiest way I found was: get 100 grams of water soluable lead (lead nitrate, or lead acetate) get 60 grams of water soluable copper (copper
nitrate, copper acetate, not chloride PbCl is insoluable in water) mix chemicals with distilled water and 2 drops of dish soap (surfactant, it makes a
smooth coating) mix until fully dissolved with a amperage limited power supply attach your graphite electrode to the positive and a piece of copper to
the negative. the copper ions take less voltage to reduce therefore they get priority to the cathode forcing the lead ions to the anode where they are
oxidized to lead dioxide (solid) you should limit the amperage to as low as possible 2ma per square cm worked well for me. rotate the electrode 90
degrees every 15 minutes for 2 hours minumim. (after 2 hours I had 10 grams of PbO2 deposited on my graphite electrode. good things come to
those who wait
Ive heard that lead acetate ''will never work'', but i have copper nitrate and can easily make more of it..
There is also other methods, using graphite powder and PbO2 powder, and epoxy glue, attached to a graphite stick, im not sure, but attached
to something that would be conductive.
Im writing here to make as few mistakes as possible, as 100 grammes of lead nitrate isnt exactly enviromentally correct, and quite hard to just
dispose of aswell..
To sum up my actual question:
would dissolving 100g Pb(NO3)2 and 60g Cu(NO3)2 in 500 mL water and electrolysing this with a Graphite
anode measuring 80 x 50 x 4 mm and a lead cathode measuring 10 x 100 mm along with a surfactant make a proper PbO2, by the sound of it?
and could it possibly be that Copper Sulfate pentahydrate could replace Copper Nitrate, as its more OTC to get CuSO4 than
Cu(NO3)2 where i live..
I have also read that the graphite is nessecary to be of a proper quality, not gouging rods.
The plate i have bought seems very dense and of high quality so for that part i would believe it should work.
added direct link to imgur, collection of electrolyte chemicals used in patents
[Edited on 25-2-2013 by Antiswat]
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Xenoid
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Quote: Originally posted by Antiswat  | i read about a member of this site's experience with an graphite stick anode to make KClO4, and apparently as he saw it, it could nearly
run forever.
I believe it was Xenoid?
[Edited on 25-2-2013 by Antiswat] |
Hey, WTF - it wasn't me!
Among other things, you seem to be confusing MnO2 and PbO2 anodes!
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Fantasma4500
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| Quote: Originally posted by Xenoid | | Quote: Originally posted by Antiswat | i read about a member of this site's experience with an graphite stick anode to make KClO4, and apparently as he saw it, it could nearly
run forever.
I believe it was Xenoid?
[Edited on 25-2-2013 by Antiswat] |
Hey, WTF - it wasn't me!
Among other things, you seem to be confusing MnO2 and PbO2 anodes! |
sorry.. guess ill take your word for true.. 
but it is possible that i have confused MnO2 and PbO2, tho it seems unlikely that it was a stick of titanium (which is all ive seen used for MnO2
anodes)
i remember it clearly as being a graphite rock..
oh wait a sec... found it now..
http://oxidizing.110mb.com/chlorate/xenoid_mn.html
apparently this is using graphite and manganese nitrate, guess i remembered wrong, but the name Xenoid is on there.. is this you or is it somebody
else using the same name??
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Xenoid
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Antiswat - you seem to be a very confused person!
The information at that site is from me, yes! It is all about coating Ti rods and MMO mesh with MnO2 for use as chlorate and perchlorate anodes!
I am not exactly sure where all this comes into the subject of your post about coating graphite with PbO2.
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Metacelsus
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| Quote: Originally posted by Antiswat |
and could it possibly be that Copper Sulfate pentahydrate could replace Copper Nitrate, as its more OTC to get CuSO4 than
Cu(NO3)2 where i live..
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No, because copper sulfate would react with lead nitrate to precipitate lead sulfate.
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Fantasma4500
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| Quote: Originally posted by Xenoid |
Antiswat - you seem to be a very confused person!
The information at that site is from me, yes! It is all about coating Ti rods and MMO mesh with MnO2 for use as chlorate and perchlorate anodes!
I am not exactly sure where all this comes into the subject of your post about coating graphite with PbO2. |
true, but i didnt remember it at all as being with MnO2.. but dont believe i dont realise theres an obvious difference in between PbO2 and MnO2
anodes..
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Fantasma4500
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that should give a good reason to use copper nitrate instead of copper sulfate
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Bezaleel
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I often read people trying to manufacture a PbO2 electrode. Are the red/brown electrodes from car batteries not suited for the purpose? These both
conduct and are covered with PbO2.
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Fantasma4500
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| Quote: Originally posted by Bezaleel | | I often read people trying to manufacture a PbO2 electrode. Are the red/brown electrodes from car batteries not suited for the purpose? These both
conduct and are covered with PbO2. |
no its not.. it has been tested and shown not to work.. google it for a sec if you dont believe me.. (: it has been discussed various places
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