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This article presents a comparative study of the deposition behaviors of Pt and PtBi nanoparticles on glassy carbon. Sea-urchin-like Pt nanoparticles and spherical PtBi nanoparticles were produced by potentiostatic deposition. Chronoamperometric characterizations show that the Pt electrodeposition corresponds to the mechanism for 3D progressive nucleation and growth. The sea-urchin-like morphology...
Several examples are presented that illustrate how the internal and surface structure of oxide supported Pt nanoparticles can change under reaction conditions. High temperatures and the presence of adsorbates may lead to different effects: (1) changes in the particle size distribution (sintering or redispersion) that may affect the crystallographic and electronic structure of the nanoparticles, (2)...
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