| 초록 |
Integration of two materials with distinct properties often leads to advanced bimetallic core-shell nanostructures possessing more active interfaces than the corresponding monometallic nanoparticles. Herein, bimetallic nanoparticles comprising a gold multipod nanoparticle (GMN) core and distinctive Pd shell (GMN@Pd NPs) are successfully synthesized in a facile and controllable manner. Epitaxial or islanded growth of Pd on the GMNs can be readily achieved using appropriate stabilizing agents. Interestingly, the I-GMN@Pd NPs (where I represents the islanded Pd shell) show substantially enhanced ORR catalytic activity compared with the corresponding monometallic counterparts. I-GMN@Pd/C shows excellent durability and better tolerance to the crossover effect, with 97.7% retention, which is much higher than that of Pt/C (76%). |
