CO oxidation of Pt thin films deposited on smooth and porous Au nanorods Original Research Article

This study compared the activity of electrochemically deposited Pt thin films on nanoporous and smooth Au rods with various Pt thicknesses for CO oxidation. With increasing Pt thickness from 1 to 4 monolayers (ML), the activity in CO oxidation increased. Nanoporous Au rods, on which 4 ML of Pt were deposited, showed ∼30 times higher CO oxidation activity than smooth ones with the same amount of Pt. A higher surface area of nanoporous Au resulted in a catalytic activity of the Pt films on porous Au superior to those of the respective smooth surfaces.