Metallic Nanocages: Synthesis of Bimetallic Pt–Pd Hollow Nanoparticles with Dendritic Shells by Selective Chemical Etching

Abstract

We report a facile synthesis of Pt-Pd bimetallic nanoparticles, named "metallic nanocages", with a hollow interior and porous dendritic shell. This synthesis is easily achieved by selective chemical etching of Pd cores from dendritic Pt-on-Pd nanoparticles. The obtained Pt-Pd nanocages show superior catalytic activity for methanol oxidation reaction compared to other Pt-based materials reported previously.

Bimetallic AuRh nanodendrites consisting of Au icosahedron cores and atomically ultrathin Rh nanoplate shells: synthesis and light-enhanced catalytic activity

“…TEM images show that the morphology of bimetallic Au@Rh core-shell nanodendrites is maintained without changes after seven cycles (Supplementary Figure S15). The particular branched structure of metal nanodendrites effectively inhibits the Ostwald ripening/aggregation phenomenon, 59 which is responsible for the excellent durability of bimetallic Au@Rh core-shell nanodendrites.…”

Multimetallic Mesoporous Spheres Through Surfactant‐Directed Synthesis

“…To enhance catalytic performance in fuel cells, most of the previous studies not only focused on the composition but also concentrated on the nanostructure of catalysts. In particular, Pt‐based multi­metallic architectures such as dendritic core–shell Au@Pt nano­particle,2 polyhedral PtCu 3 alloy,3 hollow Pt–Pd nanocage,4 hollow Pt–Ni nanosphere,5 PtPdTe nanowires,6 and Pt‐on‐Pd 0.85 Bi 0.15 nanowires7 have represented as emerging classes of nanomaterials, showing excellent performances compared with irregular Pt nanoparticles as well as monometallic Pt.…”

Single‐Crystalline Rhodium Nanosheets with Atomic Thickness

“…Formaldehyde‐assisted synthetic strategies have been successfully developed for the preparation of 2D nanosheets of Ru,26 Rh,14, 25 and PtCu 31. Similar to metal nanoporous materials,32, 33, 34, 35 2D metal nanosheets exhibit high surface areas and thus high performance in catalysis. Many 2D metal nanosheets also display unit optical and electronic properties 12, 23, 27, 28, 29, 30…”