Abstract
The synthesis of Pd@Pt core–shell nanocubes was achieved through a direct seed-mediated growth method. This process represents a simple and cost-effective way to produce core–shell nanocubes. The morphology of the Pd@Pt core–shell nanocubes varied from simple cubic to concave cubic, depending on the reducing agent and the Pt content. The selection of the reducing agent is important because the reduction rate is directly related to the shell growth. The catalytic activity and stability of the Pd@Pt core–shell nanocubes in the methanol oxidation reaction were different for the nanocubes with partial and full Pt shells.
Highlights
Seed-mediated growth has been widely used to synthesize core–shell nanoparticles because the size, morphology, composition, and structure of the nanoparticles, which affect their properties, can be controlled [1,2,3]
This indicates that the morphology of the Pd@Pt core–shell nanocubes could be controlled by adjusting the Pt monomer concentration
We report on the control of the coverage degree of the Pt shell in Pd@Pt core–shell nanocubes using a direct seed-mediated growth method
Summary
Seed-mediated growth has been widely used to synthesize core–shell nanoparticles because the size, morphology, composition, and structure of the nanoparticles, which affect their properties, can be controlled [1,2,3]. This process usually increases the cost of manufacturing of nanomaterials To overcome these issues, we recently developed a direct seed-mediated growth method that allows for a precise shell control in aqueous solutions [9,10,11]. We recently developed a direct seed-mediated growth method that allows for a precise shell control in aqueous solutions [9,10,11] In this method, the washing process after the synthesis of core material is not necessary, leading to a simple and cost-effective manufacturing procedure. When the solutions were rapidly added into the reaction mixture, truncated spherical nanoparticles were obtained This indicates that the morphology of the Pd@Pt core–shell nanocubes could be controlled by adjusting the Pt monomer concentration. We found that in MOR, the activity and stability of the two types of nanocubes were clearly different
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