Platinum is a catalyst for carbon monoxide burning to carbon dioxide in a car's catalytic converter and it also gets very hot in the process.
I'm guessing that the platinum may be causing impurities in the water to "burn" for a short time producing heat.
In any event, if cold fusion requires platinium, there would only be enough platinum to replace 2 or 3 power plants. The total platinum in the world would not fill an average sized living room.
It's too bad KISS used it all for an album cover.
The world's yearly output in 1995 was equal to a cube 154 inches on a side.