(212i) Tuning Au@Pd Nanoparticles Interfacial Engineering for Plasmon-Enhanced Hydrogen Evolution Performance

The properties of core-shell plasmonic nanomaterials, which result in hot charge-carrier generation, near-field enhancement, and injection, and elevation of local temperature, make them important candidates for electrocatalysis [1]. However, it remains unclear how plasmonic cores and shells influence catalysis performance. Herein, we present a plasmon enhanced phocatalysis of hydrogen evolution reaction (HER) controlled by an interface controlled coreshell structure of Au@Pd NPS. The Au@Pd core-shell structures demonstrated effective photoelectrocatalytic activities toward HER, whereas the catalytic activity was optimized by tuning the amount of Pd nanoparticle-coated Au nanoparticle surface. The results showed that the reaction rate decreased as the shell thickness increased. Core-shell structure-induced lattice strain and energetic hot electron are attributed to such intriguing photoelectrocatalytic performances. The results provide a reliable means to design plasmonic core-shell bimetallic nanostructures with excellent catalytic activity and durability.