| 초록 |
Highly-ordered heteronanostructures can be synthesized by the overgrowth of a secondary material on the as-prepared seed nanocrystals. The unique morphology of seed nanocrystals directs the shape of the secondary structure, which is exploited to develop structure-controlled composite nanomaterials. Herein, we report a facile and controllable synthetic strategy toward noble star-shaped bimetallic nanostructures. Gold multipod nanoparticle (GMN) core–platinum shell nanoparticles (GMN@Pt NPs) are successfully synthesized through the overgrowth of Pt on the surface of GMN seeds. Due to the structural uniqueness of GMNs, GMN@Pt NPs show bimetallic core-shell geometries, which have surface roughness and star-shaped multi-branches with sharp edges and tips. GMN@Pt NPs with optimized Pt shells show much higher catalytic activities in 4-nitrophenol reduction and ethanol electrooxidation than those of GMNs or Pt nanoparticles. |
