I don't think there is anything such as 100% Palladium, since palladium, iirc is an mix by definition. Palatinum and Iridium maybe? Either of which would be less conductivity than silver or copper.
If I were inclined to spend that kind of dough on ICs (just in case it isn't clear, I'm not) I'd ask him to show some real factual evidence of this statement:
use a state-of-the-art palladium alloy that does not oxidize and has skin-effect related properties representing up to a 25 fold improvement over those of gold, silver, copper, and aluminum.
Palladium, platinum, and iridium are all individual elements in the "transitional metal" category, along with copper and silver and gold. Conductivity in descending order is silver, copper, gold, iridium, paladium and platinum. Silver and copper are pretty close at the top, platinum and palladium are close at the bottom, and gold and iridium are in the middle with gold being the better of the two.
Iridium may be the hardest and densest element, also it has the greatest resistance to corrosion of any metal. It is
very expensive, at least as costly as platinum. If someone could find a way to make wire out of iridium it would not be cheap or easy to work with.
Palladium is cheaper and frequently alloyed with gold -- "white gold".
Assuming the goal of a cable is high conductivity, copper and silver are the only real options. For low power applications, there can be advantages to these other metals as well as carbon and other semiconductors.
