Femtosecond Laser Generation of LaCoO₃ Perovskite Nanocatalysts for Preferential CO Oxidation.

ABSTRACT: Green synthesis and defect engineering of LaCoO₃ model nanocatalysts by femtosecond pulsed laser ablation in liquid (fs-PLAL) led to the formation of two types of nanoperovskites: stoichiometric LaCoO₃ and nonstoichiometric cobalt-rich nanoparticles. Micro-Raman analysis revealed pronounced second-order phonon scattering, suggesting a high defect density. The defect spatial distribution was evaluated by high-resolution electron microscopy, employing Fourier filtering and image reconstruction. Increasing the laser fluence increases the surface defect density due to the fast cooling of primary nanoparticles, a process intensified by the inherently ultrashort pulses. Laser-produced nanoparticles exhibited internal defects, a characteristic absent in those produced by a c

SUBMITTER: Lasemi N 

PROVIDER: S-EPMC12624525 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature