Quince
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Pt electroplating
Assuming I have some Pt metal, how would I proceed to plate it onto some other metal? In my Google searching I didn't find much clear
information. I'm assuming I can dissolve Pt in Aqua Regia, and then create some Pt-based electrolyte from this so I can plate it onto the W.
Any suggestions?
\"One of the surest signs of Conrad\'s genius is that women dislike his books.\" --George Orwell
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uber luminal
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the reason Pt is used as an 'inert' electrode is because most other things will reduce or oxidize before it does. I dont think its possible
in aq. soln.
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BASF
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I once made a solution of 2 cm platinum wire (ca.200mg) in aqua regia. It is still very difficult to dissolve because at the beginning the surface of
the wire is quite small.
To speed up the process i hammered it flat.
It took about two months to dissolve the 2 cm of wire though...
I believe u could use such a hexachloroplatinate-solution to platinate less noble metals such as copper, for example.
I did not try this with platinum, but i am 100% sure this can at least be made with gold,silver,mercury - so why not with Pt?
Copper coins can be used for qualitative analysis of noble metals such as silver in solution of aqua regia, as they reduce the noble metal and are
plated with a fine layer of the metal. Also mercury deposits on copper, forming an amalgam.
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a_bab
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BASF, did you try to heat up the aqua regia solution to speed up the reaction? Also, using HF instead of HCl will certainly dissolve the Pt much
faster.
Quince, while looking for platinum on the Internet , did you find something about
the silver plating? I'm very interested in this subject.
[Edited on 12-5-2005 by a_bab]
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Esplosivo
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Axehandle had dissolved Pt to the hexachloroplatinate IIRC by electrolysing Pt electrodes in HCl conc. He had some info on his site, but strangely
enough I can't get in and cannot give you a link. He might give you some help himself. He intended to use the hexachloroplatinate soln to plate
Titanium electrodes which he planned to use in a chlorate cell. Hope this helps.
Btw, what's your intended use to the Pt plated on another metal?
Theory guides, experiment decides.
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Quince
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I want to plate some tungsten, for plasma in air applicatioin (the tungsten would oxidize otherwise).
I know I can buy platinum plated tungsten wire, but I need planar electrodes.
[Edited on 12-5-2005 by Quince]
\"One of the surest signs of Conrad\'s genius is that women dislike his books.\" --George Orwell
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