Chemgineer
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Electrolysis of gadolinium chloride
I produced a solution of gadolinium chloride by neutralising the metal with 20% hcl solution. This is a rather quick process and generates allot of
heat.
I ensured the solution was ph neutral and set it up in a small duran bottle with a platinum wire anode and titanium cathode.
This was mostly a waste of time because I believe gadolinium hydroxide dropped out of the solution and coated the cathode stopping the circuit.
I believe this is the same way the magnesium salt reacts.
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yobbo II
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http://www.chlorates.exrockets.com/mag_chlorate.html
You can make mg chlorare ok
See exrockets.com
Posted wrong link.
Yob
[Edited on 3-8-2024 by yobbo II]
Attachment: mag_chlorate-1.pdf (112kB)
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bnull
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Same reaction as magnesium, calcium, aluminum. The reduction potential for gadolinium(III) is very close to the one for magnesium (from the CRC
Handbook 97th):
$$Gd^{+3}(aq)+3e^-\leftrightarrows Gd(s)~~~~-2,279~V.$$
What was the purpose, by the way? Chlorate or electroplating?
Quod scripsi, scripsi.
B. N. Ull
P.S.: Did you know that we have a Library?
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Chemgineer
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Quote: Originally posted by bnull  | Same reaction as magnesium, calcium, aluminum. The reduction potential for gadolinium(III) is very close to the one for magnesium (from the CRC
Handbook 97th):
$$Gd^{+3}(aq)+3e^-\leftrightarrows Gd(s)~~~~-2,279~V.$$
What was the purpose, by the way? Chlorate or electroplating? |
Chlorate was the plan, i'm interested how volatile different chlorates are and the nice colours they produce.
I've seen the paper on producing magnesium chlorate before, it would be a 3D printoing project though to make the spinning cathodes!
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knowledgevschaos
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What are the spinning cathodes?
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bnull
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The cathodes are fitted to a motor which spins them like a drill bit. The name is amusing but that's exactly what they are. From the paper above
(Vasudevan et al., Electrolytic preparation of magnesium chlorate from magnesium chloride):
| Quote: | | The cathodes were cylindrical stainless steel rods of different dimensions (80mm (h) x 10 mm (dia.), 70.5 mm (h) x 15 mm (dia.) and 90 mm (h) x 25 mm
(dia.)). Depending on the parameters, each cathode was fitted to a rotating assembly and positioned at the centre of the celll.
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Quod scripsi, scripsi.
B. N. Ull
P.S.: Did you know that we have a Library?
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bnull
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Read the report below, suggested by @"The WiZard is In" back in 2011 (link updated). I was browsing the old threads in the forum and found it in a
thread about urea perchlorate. Preparations of many chlorates begin on page 104 (118 in the PDF).
Quod scripsi, scripsi.
B. N. Ull
P.S.: Did you know that we have a Library?
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