Customizing Pt5Ce Alloy Particle Sizes for Oxygen Reduction

Using a gas-aggregation technique, two Pt-RE alloys in the nanoparticle form with even sizes, PtxY and PtxGd (x specifies changing stoichiometry or poorly characterized alloy structure), have been made ready from cluster sources. Their specific activities reached 14 mA cm−2, while the mass activities approached 4 A mgPt−1. These are among the highest values reported so far.