Controlling alloy to core-shell structure transformation of Au-Pd icosahedral nanoparticles.

The structure transformation between Au–Pd alloy and core–shell icosahedral nanoparticles was achieved by a one-step aqueous-phase strategy. This strategy provided a way to tune the structure and atomic distribution of Au–Pd icosahedral nanoparticles. It could modulate the electronic structure of Pd, achieving promoted electrocatalytic ability toward the hydrogen evolution reaction.