Solid-state exchange of palladium in zeolite NaX Original Research Article

β−PdCl2→400°Cα−PdCl2→500°C,O2PdO→750°CPd0The Pd species are incorporated in the zeolite in two stages, one occurring at about 400°C via gas phase transport of Pd6Cl12 molecules into the supercages followed by a transfer of fragments to the smaller zeolite cages and a second one occurring between 600 and 700°C via surface migration starting from PdO species.