palladium4dPalladium is a silvery-white metal used in jewelry, catalysts, electronics, and fuel cells. Palladium is a lustrous silver-white metal with element symbol Pd and atomic numberPalladium4d is an e-commerce platform that sells boots, hh tops, low tops, sandals, slides, jackets, sweatshirts, t-shirts, bags, and socks of all sizes for men, women, and children.