Platinum is being outdated by Palladium because if a palladium-to-platinum ratio is made, the number of ounces of platinum needed to buy an ounce of palladium hit its highest since 2006 in April at 0.33, up from 0.20 a year ago.

David Wilson, an analyst at Societe Generale is quoted as saying:

“There seems to be a general acceptance that the palladium story is fundamentally stronger, largely because of the Chinese motor-vehicle sector, while the platinum motor-vehicle-catalyst market in Europe is still looking not particularly healthy."

Source: http://www.thejakartaglobe.com/anufacturing/palladium-expected-to-steal-platinums-luster/372643 ^[1]