Squeezing Out Nanoparticles from Perovskites: Controlling Exsolution with Pressure.

ABSTRACT: Nanoparticle exsolution has emerged as a versatile method to functionalize oxides with robust metallic nanoparticles for catalytic and energy applications. By modifying certain external parameters during thermal reduction (temperature, time, reducing gas), some morphological and/or compositional properties of the exsolved nanoparticles can be tuned. Here, it is shown how the application of high pressure (<100 bar H₂) enables the control of the exsolution of ternary FeCoNi alloyed nanoparticles from a double perovskite. H₂ pressure affects the lattice expansion and the nanoparticle characteristics (size, population, and composition). The composition of the alloyed nanoparticles could be controlled, showing a reversal of the expected thermodynamic trend at 10 and 50 bar

SUBMITTER: Lopez-Garcia A 

PROVIDER: S-EPMC11579965 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature