Investigations on supported bimetallic PdPt nanostructures

Structural and electronic effects in bimetallic PdPt nanoparticles on TiO2 for improved photocatalytic oxidation of CO in the presence of humidity

“…To reflect the structure expected at thermodynamic equilibrium, Pd atoms occupied the low energy positions to ensure surface energy minimization. However, in the Pd 0.2 Pt 0.8 configuration, there were too few Pd atoms to occupy all the corner, edge and facet sites, which is otherwise known as the reservoir effect [44], resulting in a fully segregated particle with a Pt-core and a partial Pd-shell.…”

“…, segregation was limited by the number of palladium atoms available to occupy all the low energy positions[44]. Palladium atoms concentrated primarily at corner and edge sites before populating the crystal faces.…”

Growth of nanostructures by cluster deposition: Experiments and simple models

“…It is true that neither islands grown on a substrate are generally in equilibrium, but the quenching rate is very high in a beam, and the method is more flexible since one avoids the effects of nucleation and growth on a specific substrate. For example, PdPt alloy clusters -which are known to have interesting catalytic properties -can be prepared with a precise composition (corresponding to the composition of the target rod, see below) and variable size and then deposited on a surface [44]. The same is true for SiC clusters where one can modify the electronic properties of the famous C 60 clusters by introducing in a controlled way Si atoms before deposition [45].…”

Structures of small Pd–Pt bimetallic clusters by Monte Carlo simulation

“…Besides the experimental results, the Pd-Pt bimetallic clusters were studied by theoretical methods. Rousset and coworkers studied the segregation behavior of Pd-Pt bimetallic clusters using Monte Carlo (MC) simulation [15]. They observed that the surfaces of the clusters are Pd-enriched.…”