文摘
A Pd skin with 2–3 atomic layers on AuCu intermetallic nanoparticles (PdSAuCu iNPs) is controllably fabricated. The PdSAuCu iNPs exhibit excellent electrocatalytic activity towards the oxygen reduction reaction (ORR) in alkaline media, far better and more stable than the commercial Pt/C catalyst. The AuCu intermetallic substrate causes a shrink strain in Pd lattice of the skin, which reduces the oxygen affinity of Pd and thus enhances the catalytic activity.