Manipulating Pt-skin of porous network Pt-Cu alloy nanospheres toward efficient oxygen reduction

An innovative strategy of manipulating in-situ formation of Pt-skin on surface of porous network platinum-copper alloy nanospheres has been proposed by acidic reductant in a facile aqueous synthesis. A combination of experimental results and theoretical calculations reveals the enhancement effect of PtCu-alloy@Pt-skin nanostructure on catalytic activity and stability toward ORR.