Electrochemistry PGM electrochemistry???

[amosfella]

I'm done a lot of reading about gold and silver electrochemistry, but I have heard little about PGM electrochemistry. Are there cells for seperating the PGMs from each other and other metals?? Where would one start in that?? So far, google searches have gotten me nowhere.
Does anyone know where to start in this field??

 

[nickvc]

PGMs generally aren't run through cells for refining, the silver cell will leave them in the slimes so long as you keep within its operating parameters but palladium can be co deposited with the silver if your not careful. The refining of PGMs is in my opinion not easy, recovery not to bad but most PGM refining even in big companies is fairly small scale and in my opinion an art as much as a science with the limitations that chemistry imposes added on. If there is any way to refine through cells either Lou or lazersteve may know but I don't know of one or even if one exists.

 

[Lou]

Pt and Pd are usually plated from basic milieu and form high stress deposits that often grow no thicker than 50-100 microns.

In acid conditions, gold anodes are used in the Wohlwill cell and PGMs report to the electrolyte.

As for rapid dissolution, compartmented membrane cells or high frequency AC can rapidly break down even PtIr.

 

[Lino1406]

Here is "the electrochemistry of PGM's"
Ru +0.49v
Hg +0.78v
Ag +0.8v
Rh +0.8v
Pd +0.98v
Ir +1.02v
Pt +1.2v
Au +1.5v
(more or less)