New Insights into the Structure of PtPd Bimetallic Nanoparticles and Their Atomic Resolution Images by Cs-Corrected STEM

The chemical synthesis and morphological control of bimetallic (BM) nanoparticles has received particular interest because of their myriad properties and diverse potential applications such as: optical, magnetic, catalysis and others, which are highly tunable and superior compared with those of their monometallic one. [1, 2] The fabrication of such BM core-shell, heterostructures, and alloy nanocrystals are the possible candidate for increasing mass specific activity of the nanoparticle and also minimizing the cost by decorating the precious metals in the shell. Moreover, the purpose of better tailoring their activities and understanding the correlation between their structures and various properties, control over the shape, size and composition. The distinct feathers expected for these BM nanostructures include the physical and chemical interactions among different atoms and phases that lead to novel functions, the changed miscibility and interactions unique to nanometer dimensions, and the morphological variations that are related to new particles.