Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: Pt electroplating
Quince
International Hazard
*****




Posts: 773
Registered: 31-1-2005
Location: Vancouver, BC
Member Is Offline

Mood: No Mood

[*] posted on 10-5-2005 at 22:53
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
View user's profile View All Posts By User
uber luminal
Hazard to Others
***




Posts: 124
Registered: 25-8-2004
Member Is Offline

Mood: No Mood

[*] posted on 11-5-2005 at 22:43


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.
View user's profile View All Posts By User
BASF
National Hazard
****




Posts: 282
Registered: 5-11-2002
Member Is Offline

Mood: hydrophilic

[*] posted on 12-5-2005 at 03:18


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.




View user's profile View All Posts By User
a_bab
National Hazard
****




Posts: 458
Registered: 15-9-2002
Member Is Offline

Mood: Angry !!!!!111111...2?!

[*] posted on 12-5-2005 at 06:42


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]
View user's profile View All Posts By User
Esplosivo
National Hazard
****




Posts: 491
Registered: 7-2-2004
Location: Mediterranean
Member Is Offline

Mood: Quantized

[*] posted on 12-5-2005 at 06:54


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.
View user's profile Visit user's homepage View All Posts By User
Quince
International Hazard
*****




Posts: 773
Registered: 31-1-2005
Location: Vancouver, BC
Member Is Offline

Mood: No Mood

[*] posted on 12-5-2005 at 10:26


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
View user's profile View All Posts By User

  Go To Top