Volume-dependent catalytic efficiency of highly durable Au@Ag-Pt core@multi-shell nanoparticles in methylene blue reduction.

ABSTRACT: Monodispersed spherical Au@Ag-Pt core@multi-shell nanoparticles were synthesized using a co-reduction method that integrates galvanic replacement with a versatile reducing agent. Their nanostructure was thoroughly characterized using scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy. The average diameter of the Au core was 18 nm, while the Pt granules within the shell region measured approximately 2.1 nm, with the Ag-Pt shell having an average thickness of 3.3 nm. The catalytic activity of these nanoparticles was evaluated by the reduction of methylene blue dye in the presence of NaBH₄, monitored by ultraviolet-visible spectrophotometry. The mass-to-charge ratio peaks of the reduced dye were further quantified using electrospray ionization mass s

SUBMITTER: Lee HJ 

PROVIDER: S-EPMC12642859 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature