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What's the cheapest metal powder to make?
An usual solder for aluminum is zinc, and even better an alloy of 15% zinc and 85% tin, sometimes wi ...
14-2-2020 at 07:27
by: stamasd
Cleaning Uranium Metal
Excellent! This requires a thorough peer review including exact reproduction in an independent lab. ...
18-12-2019 at 14:16
by: stamasd
Tungsten metal plus piranha solution?
[img]https://i.postimg.cc/BnKjygg9/Untitled.png[/img]

The tungsten dissolution is complete. I hav ...
26-11-2019 at 13:52
by: stamasd
Tungsten metal plus piranha solution?
I can't use the first link "you have reached a page that's unavailable for viewing"
As for the seco ...
22-11-2019 at 07:56
by: stamasd
Tungsten metal plus piranha solution?
Only 2 small pieces of tungsten remain, about 0.5mm thick and 3-4mm long each.

[img]https://i.pos ...
20-11-2019 at 16:35
by: stamasd
Tungsten metal plus piranha solution?
I'll do that in a small sample when all the tungsten is dissolved. The rate of dissolution has slowe ...
15-11-2019 at 05:31
by: stamasd
Tungsten metal plus piranha solution?
Actually I'm not so sure about that. I haven't touched the flasks for 4 days and their appearance is ...
14-11-2019 at 19:51
by: stamasd
Tungsten metal plus piranha solution?
But then I wouldn't be investigating which compound I get from dissolving tungsten in plain H2O2, as ...
9-11-2019 at 03:00
by: stamasd
Tungsten metal plus piranha solution?
I don't have a cheap source of powdered W or WC. My W is in the form of broken 2mm rods. I'd also pr ...
8-11-2019 at 15:34
by: stamasd
Formic acid production by electrochemical reduction of CO2
[rquote=625489&tid=154270&author=Fery][rquote=625472&tid=154270&author=stamasd]You d ...
4-11-2019 at 13:29
by: stamasd
Formic acid production by electrochemical reduction of CO2
@clearly_not_atara very interesting. The first system seems to be discontinuous and not electrochemi ...
4-11-2019 at 03:32
by: stamasd
Formic acid production by electrochemical reduction of CO2
[rquote=625450&tid=154270&author=Sulaiman][rquote=625447&tid=154270&author=stamasd] ...
3-11-2019 at 18:14
by: stamasd
Formic acid production by electrochemical reduction of CO2
[rquote=625445&tid=154270&author=Chemetix]This sort of chemistry is the holy grail of chemic ...
3-11-2019 at 16:01
by: stamasd
Formic acid production by electrochemical reduction of CO2
I have seen this method mentioned in passing in an unrelated article, but without any details attach ...
3-11-2019 at 14:57
by: stamasd
Nitric acid production by ammonia oxidation using electrolytic oxidation
OP: note that the paper you linked to investigates the electrochemical oxidation of ammonia at very ...
3-11-2019 at 14:51
by: stamasd
Tungsten metal plus piranha solution?
2 KMnO4 + 3 H2O2 --> 2 MnO2 + 2 KOH + 2 H2O + 3 O2

Mn(VII) is reduced to Mn (IV) by the oxygen ...
3-11-2019 at 06:16
by: stamasd
Tungsten metal plus piranha solution?
I don't have an explanation, these are just my observations. If I were to guess, I'd venture to say ...
2-11-2019 at 12:37
by: stamasd
Tungsten metal plus piranha solution?
Okay update with some very interesting information and some calculations.

I pulled out all of the ...
2-11-2019 at 11:29
by: stamasd
Tungsten metal plus piranha solution?
Hmm. No pics today, but...
I spent a little time looking at the 2 flasks and I noticed something in ...
1-11-2019 at 16:53
by: stamasd
Tungsten metal plus piranha solution?
I have space and reagents, time however is another matter... I happen to have some time right now th ...
31-10-2019 at 05:51
by: stamasd
Tungsten metal plus piranha solution?
Pics from this morning.

Before:

[img]https://i.postimg.cc/MZrNvKc8/20191031-081030-BEST-before ...
31-10-2019 at 04:34
by: stamasd
Tungsten metal plus piranha solution?
Quick update on this after a couple of months.
I had originally set up an experiment with a 2g frag ...
30-10-2019 at 07:23
by: stamasd
Tungsten metal plus piranha solution?
I don't have access to 50% H2O2, the max I can get is 27%. Yes, TIG electrodes; the one I'm using is ...
24-8-2019 at 03:00
by: stamasd
Tungsten metal plus piranha solution?
See that's the kind of information that I could have used before starting. :) ^^
What I found by m ...
23-8-2019 at 13:07
by: stamasd
Tungsten metal plus piranha solution?
Yes, less ammonia should work. The reaction appears to proceed vigorously enough at RT when enough p ...
23-8-2019 at 07:19
by: stamasd
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